Don't go thinking what you did was right! The show didn't get canceled because you weren't hurt too bad! But that doesn't make it okay! You're still a student here, with only a provisional license! When there's a fight, you rely on us! We're here to protect you kids!Ryo Inui scolding Izuku Midoriya in "Festival All Day Long!!"
Ryo has the appearance of dog due to his Quirk. He has scruffy blond hair sticking straight out behind his head. He also wears a muzzle over his snout on his hero costume.
When angry, Ryo speaks in an incoherent and violent manner with a mix of words and a sound akin to a dog's growling.
During the Opening Ceremony, Ryo has some final comments. Unfortunately, his anger causes his speech to come out as a mix of words and incoherent growls, ending with a howl which scares a few of the students. Sekijiro Kan relieves Ryo of his speech and reiterates what Ryo wanted to say as the Pro Hero sulked away angrily.
For the U.A. Culture Festival, Ryo is in charge of security. The night before the festival, Ryo is seen yelling at Class 1-A to go to sleep.
As the festival begins, Ryo smells the intruders and heads out with several clones of Ectoplasm. They come across Gentle Criminal and La Brava after the criminals are beaten by Izuku Midoriya, and Gentle declares his surrender.
Skilled Youth Counselor: As a high school guidance counselor, it is implied that he is skilled in helping youths deal with their problems.
Dog (犬 Inu?): Nothing is known about his Quirk except its name and how it makes him appear as a dog. It can be assumed that the Quirk gives him all the advantages that a dog might have, including a heightened sense of smell and hearing.
Ryo and Sekijiro appear to get along well. After Ryo has an angry fit, Sekijiro approaches him and takes over for his speech, having understood what Ryo wanted to say.