Kuudou Hinokage (日之影 空洞, Hinokage Kuudou) is a senior of Class 13 and was the 96th and 97th Student Council president of Hakoniwa Academy. Medaka Kurokami's immediate predecessor, Hinokage recommended her as his successor as Student Council president.
Hinokage is a friendly and jovial student. Medaka describes Hinokage as similar to Youka Naze, in that he pretends to be a bad guy so that he can shoulder everything on his own. Indeed, during his tenure as president, he never thought as his enemies as human; rather as a road to step on. Hinokage is highly protective of his fellow students, and is enraged when they are cut down in front of him. He is also highly proud; he is chagrined to have run away from a fight, and is later ashamed that he could not help Medaka in her fight. Though Hinokage held pride in protecting the academy without receiving any recognition, he is moved to tears when the student body remember and cheer for him.
Hinokage's most notable characteristic is his great height; upon first seeing him, Naze remarks that it would be more appropriate to measure him in meters rather than centimeters. He has light orange, spiky hair that reaches his shoulders. Hinokage wears his Student Council uniform (different from Medaka's version), though his is a custom order to fit his size. During the vice-president's match, Hinokage wears a pair of black pants with a matching sash, and light colored wristbands. He does not wear a shirt. Ten years later, Hinokage wears an outfit similar to his academy uniform, though with a larger collar and the addition of a black tie.
As Student Council president, Hinokage was well-liked, and protected the school for an entire year, even after the other members of his Student Council all quit. Whenever he fought, Hinokage only saw enemies, and didn't care what they were thinking. Hinokage fought daily against delinquents who would make trouble at the academy. He fully intended to become Student Council president again, but the April of his third year, he met Medaka for the first time, when she stopped him from finishing off an opponent. Hinokage and Medaka ended up fighting for three days and nights, and afterwards, they would begin fighting whenever they met. This was because Medaka would always interrupt his own fights. Hinokage eventually asked Medaka why she kept stopping him. He found her reasoning bizarre, but realizing that she wanted to protect everyone and had always considered him an ally, Hinokage decided to retire, and asked Medaka if she wanted to become Student Council president. Because Medaka was the only student who could find Hinokage, he recommended her as his successor as Student Council president.
Kumagawa Incident Arc
Hinokage is in Class 13's senior classroom when Medaka and Naze come to ask for his help. He greets them cheerfully, congratulating Medaka on her success as Student Council president. He is surprised when she asks him for help with Class -13. He refuses, telling her not go beyond her responsibilities. Hinokage then leaves. He reappears in Class 13's junior classroom (Class -13's temporary headquarters), driving Misogi Kumagawa's head into a desk. Hinokage proceeds to pound Kumagawa through the wall, telling him to bear with his punches. He tells Kumagawa that if he apologizes in tears, he might let him go. Kumagawa does so, horrifying Hinokage with his behavior. He is stunned to see Kumagawa's wounds disappear, and is further shocked by the appearance of Shibuki Shibushi and Gagamaru Chougasaki. Hinokage finds himself facing three opponents. He decides to retreat, returning to his classroom. Meeting back up with Medaka and Naze, he tells Medaka that he wants to meet her friends, as he will be getting involved with stopping Class -13. Hinokage appears among Medaka's group, surprising them. He finds most of them unqualified, and tells Medaka trying to fight Class -13 with her group will be suicide. He goes on to explain the difficulties of fighting Class -13, and why the Student Council are unqualified to do so. After Mogana Kikaijima slaps him for insulting her friends, he apologizes for offending her. Medaka asks him to do something about the group's current weakness. Hinokage suggests a Devilize Training camp.
After Medaka declares a Student Council battle with Kumagawa, Hinokage expresses his distress with their present situation. He worries about the Devilize Training, as he had planned to use the whole summer, and they will need at least two weeks. After discussing their options, the group decides to throw the General Affairs Manager's Battle, and use the two weeks to complete the Devilize Training. On July twenty-fifth, during the General Affairs Manager's Battle, Hinokage and Maguro supervise the Devilize Training with Kikaijima and Kouki Akune taking part. They ask Medaka to cheer for Zenkichi in their stead. In the midst of their training, the group are attacked by Shibushi, Chougasaki, and Mukae Emukae. Akune and Kikaijima plead with Hinokage not to sacrifice himself for their sakes, who uses his body to protect his underclassman. Hinokage declares he will protect them; Shibushi seriously injures them in annoyance. An enraged Hinokage attacks, only to be defeated as well. The other members from the Student Council arrive in the parking lot, and treat Hinokage and the others at Naze's lab before sending them to the hospital. Sometime before the Treasurer's Battle, Hinokage is released from the hospital. Hansode Shiranui approaches him, and Hinokage admits to her that, after watching Medaka take a Minuses hand in the Treasurer's Battle, he feels ashamed of himself for being unable to do more. Shiranui tells him to participate in the Vice-President's Battle, but a distraught Hinokage laments that his Abnormality has already lost to a Minus. Shiranui leans over him however, saying she will "lend" him her own skill, and reveals her Real Eater. On August fifteenth, Medaka prepares to face Chougasaki in the Vice-President's Battle. They are interrupted by the arrival of a black-haired Hinokage, who offers to fight Chougasaki in Medaka's place.
Hinokage confirms with Tokemichi Choujabaru that he can participate. He is unmoved by Chougasaki's taunts, instead greeting Medaka. Choujabaru returns with confirmation that Hinokage can participate. The group moves to an under construction building for the Vice-President's Battle, "Dropping Mad Dog". Up on the high beams, Hinokage attacks Chougasaki first, stating that objects moving fast will not fall regardless of their weight. Hinokage tells Medaka to watch closely, and introduces his new Abnormality as Theme Song. Hinokage attacks relentlessly, but Chougasaki is unharmed and unconcerned, even going so far as to put his hands in his pockets. Though Chougasaki mocks Hinokage's desire for understanding, Hinokage's continued optimism annoys Chougasaki. As he continues to attack, Hinokage wonders why Chougasaki seemingly cannot feel his punches. He is surprised when the building collapses around him. Though he is buried in the rubble, Hinokage survives, and even manages to keep himself from being disqualified. Creating several copies of himself, Hinokage charges Chougasaki, attacking from all directions. He is distraught to see the damage from his attacks transferred to Medaka. Though Medaka rallies, Hinokage collapses, Theme Song finally wearing off. He is roused by the cheering of the students, having remembered him now that Unknown Hero is no more. With a roar, Hinokage destroys the platform he and Chougasaki are on top of. He rides Chougasaki's body as they fall, crash landing on top of him. Because Hinokage's own body does not touch the ground, Choujabaru declares him the winner. As the students cheer for him, a tearful Hinokage tells Medaka he was proud to serve unrecognized, but that being appreciated is really great. Hitomi Hitoyoshi tends to Hinokage. Naze questions Hinokage on how he obtained his new Abnormality, but Hinokage refuses to answer. Chougasaki mockingly congratulates Hinokage on his victory, pointing out that Hinokage is near death, while Chougasaki himself is unhurt and unreformed.
Kurokami Medaka's Successor Arc
Unknown Shiranui Arc
At the end of the academic year, Hinokage is among the graduating students present at the Hakoniwa Academy graduation ceremony. When asked by Garaharu Ushibuka why Kumagawa is speaking for the graduating class instead of Hinokage himself, Hinokage replies that he is not good enough.
Bouquet Toss To The Future Arc
Hinokage is one of the seniors Zenkichi calls to fight Medaka as part of the 100 Flowers Run. Hinokage and members of several generations of the Student Council confront Medaka as part of the 100 Flowers Run in the Student Council office. His message to Medaka is not to be shy.
Firm Destruction (拳々破, Ken Ken Pa): A barrage of fifty punches that Hinokage uses to pummel delinquents into submission. Combined with Hinokage's great strength, this attack is extremely powerful, as he was able to knock Kumagawa through a wall after only eight "serious" punches.
Unknown Hero/Mister Unknown (知られざる英雄, Announ Hīrō/Misutā Announ): Hinokage is overwhelmingly and abnormally strong, standing above all others when it comes to physical strength. However, because he is so intimidating, people subconsciously block Hinokage from their senses and memory after meeting him. This ability is very similar to Medaka's Alpha Presence, but whereas hers only affects animals, his affects people. Almost no student can recall him, thus not allowing him to even be called Mister Unknown, and nobody can recognize his existence, including even Medaka. However, if one person is able to see him, everyone present will become able to. When he gets serious however, no one can find him. Also, when covering someone else, Hinokage cannot use his Abnormality to camouflage himself. Because of his great strength, Hinokage is regarded as a hero by Medaka, and Shiranui remarks that he is strong enough to take on an entire army on his own.
Theme Song (光化静翔, Tēmu Songu): Hinokage's new Abnormality, which was created when Shiranui altered Unknown Hero with her Real Eater, turning the pure strength skill into the pure speed skill. When activated, his hair turns black and a black tiger-stripe pattern spreads over his body. In both appearance and presence, this new form has been compared to Medaka's Altered God Mode. Theme Song vastly improves Hinokage's speed, raising it to the same level as Medaka's Kurokami Phantom, but without causing damage to his body. This skill, allowing Hinokage to move at the speed of light, removes the weakness of his previous Abnormality; the dullness of his movements caused by his great size. However, Theme Song only lasts for a short time before wearing off, at which point Hinokage is left exhausted.
- Theme Song Full Chorus (光化静翔 フルコーラス, Tēmu Songu Furu Kōrasu): Hinokage unleashes a flurry of attacks, similar to his Firm Destriction, but from multiple directions rather than just directly in front of him. Because this is a new technique, Hinokage cannot hold back when using it.
- Theme Song Acoustic Version (光化静翔 アコーステイク バージョン, Tēmu Songu Akōsuteiku Bājon): In this mode, Hinokage can replicate his own body. Unlike Medaka's shadow clone technique, his replications are real and can cause physical damage.
- When translated from kanji, Theme Song can mean Becoming Light, Then Soaring Gently. The kanji themselves can be read as Kouka Seishou, a play on 校歌斉唱 (Kouka Seishou) meaning, "singing of a school song".
- Hinokage's new epithet, Known Hero, in kanji is 知られた英雄 (Shirareta Eiyū).
- Hinokage's Abnormality always uses the kanji (知られざる英雄), but is pronounced one of three ways by the katakana. When used in the narration to describe Hinokage, it is pronounced Shirarezaru Eiyū. When used to describe the Abnormality itself or when a character refers to him, it is pronounced Misutā Announ. Only once is it actually pronounced Announ Hīrō, by Kikaijima when Shibushi was attacking the group during their training.
- Hinokage was voted the fifteenth most popular character in the series in the third popularity poll with 140 votes.
- Hinokage was voted the sixteenth most popular character in the series in the second popularity poll with 162 votes.