Keigo is a man of average height with a slim and narrow build. It is pointed out by himself, that his back muscles are not broad enough. He has feathery ash blonde hair swept messily backward with some of the front tufts sticking up in arcs above his head, notably thick eyelashes, and some faint stubble on his chin.
His eyes are gold-brown and rather triangular in shape, with two little black triangles just below his tear ducts, making his eyes somewhat resemble those of a bird. The marks around his eyes are naturally innate since he already had them as a child. Due to his quirk, he has a set of large bright red wings with feathers that gradually lengthen the further down they go. He wears a black shirt with a wavy golden pattern like a ripple in a pond, over which he has a tan jacket with a high collar, the insides and cuffs of the sleeves lined with white fur, and black gloves. He has a square-shaped lobe piercing in each ear, although these are rarely visible as he usually wears a pair of yellow headphones over them. His headphones most likely have protection purposes, since the velocities in which he moves are capable of damaging eardrums beyond repair.
A shaped, yellow-tinted visor protects his eyes, presumably from UV radiation above the clouds and dirt particles at high speed. His jacket is specially modified, with two large slits over his shoulder blades, which allow his wings to easily protrude. His costume resembles an aviator's uniform. During his fight with dabi, Keigo obtains a scar across the left side of his face.
Keigo is shown to be highly intelligent, both emotionally and logistically. He promotes a carefree and jovial attitude, while his constant vigilance often hides under layers of serenity and equanimity. Keigo acts laid-back while being on constant alert.
Keigo follows the orders of the HPSC without hesitation but with subliminal cynicism. Nevertheless, Keigo dislikes formalities, often acting in an unpredictable way while being cocky and taunting. He acts nonchalant and jokingly submissive since he does not care about social status or recognition. Keigo uses a lot of sarcasm such as when he agrees Katsuki Bakugou serenely when claims to have been faster, and he reacts with ironic adaptation when someone claims him to be lesser.
Keigo believes that popular approval is the most important metric a pro hero should be judged for since it is the task of a hero to put the citizens at ease - something that he claims to be unable to do. Keigo shows a preference for the lower hero ranks as it would allow him more freedom and avoid the burdens of being a top hero. He states his wish is to patrol in a free, leisurely fashion and "take it easy."
Still, Keigo is said to be ferocious in regards to his Pro Hero duties, understanding the importance of a leader figure among all heroes after all might's retirement. When around others he likes, Keigo is very talkative and can have a prolonged one-sided conversation casually while helping dozens of civilians simultaneously in his area of influence. He also claims that he will always strive for what he longs for. Ironically, despite his bird-like Quirk, he seems to have a special liking for bird-based meals; making him a raptor.
Keigo is a highly intelligent individual, as his cunning is shown multiple times as he outsmarts his surveillance monitors, or as he had planned his actions ahead in order to have explanations for the high end -incident. He is rational and more far-sighted than other Pro Heroes, allowing him the best chances to go undercover.
He appears relaxed in situations of great pressure, such was the case of the Hero Rankings for the new Top Charts year. Keigo's gestures are lively, expressive, and highly personalized, as he always wants to get his voice across. He claims to be "bad at keeping it in", even though he possesses complete control over his facial expressions and body language, which makes him an extremely skilled liar. But apparently he adores the truth, finding lying to be too much work. These traits allowed him to easily work his way into the Liberation Army, and the slight change of motivation expertly conveyed to Endeavor the information about the Liberation Army's aims and change of leadership.
