Sendo is a tall, lean, young man who has tragus-piercing, short, salmon pink slightly fluffy hair with two side bangs, the one on the left being longer on the right, reaching his chin; meanwhile, the one on the right is reaching his cheek. There are small undercuts underneath and thin pale red eyes with long eyelashes. He is mostly seen with a calm or negative look on his face, and has prominent lips.Those questioning his position as the ace striker of the U-20 team make Sendo feel insulted, and during the match against Blue Lock, he pushes himself and wants to become better, deciding to aim higher and marry a Hollywood actress instead of a Japanese gravure idol that he previously settled for.Sendo tends to be arrogant and confident in his own skills. He comes off as annoying, blabbering about all his accomplishments, easily being provoking and loud to anyone. He never hesitates to talk back to people who irritate him, making him seem like an assertive person. He refuses to let go of his ego, having a big passion for soccer.Sendo's ability to play as a second striker shined where he dropped into midfield to act as Shido's shadow as well in the U-20 team. He also assisted Baro in Ubers, scoring when the ball was in second play. His all-round play as well as his willingness to contribute wherever he can show great tenacity, a good technical base in every phase of the game, and immense work rate and stamina.When the ball is in critical moments, Sendo acts quickly on both offense and defense. Sendo was able to score a goal after the ball deflected off Hyoma Chigiri's block for Baro.In the U-20 match against Blue Lock, Sendo managed to make a goal line clearance after Bachira's monster dribbling. Right after he made the clear, he was a part of the counterattack, being able to get on the other side of the pitch for a shot before Nagi and Baro came in to block it. Sendo also saved Ubers from losing when he stopped Yo Hiori feint shot.Sendo was able to press on Isagi for Niko to steal the ball from him.Something that makes him happy is being praised. Something that makes him sad is being made fun of.

He sleeps with belly warmers because he is sensitive to the cold.He recently cried when he saw people badmouthing him on the internet.

His strength is his stardom. His weakness is his fragile heart ("I need to work on my mental strength").

His favorite animals are swans because he thinks the way they flap their wings around in water looks like him.

His hometown is Yamagata Prefecture, Tohoku.

His favorite football player is Erling Haaland.His dominant leg is his right one.

His hobby is girl hunting.

His favorite season is summer because he gets to see swimsuits.

His ideal type is someone who changes in a second ("If she's cute, I'm in!").

His favorite TV show is Nogizaka Kōjichū ("I watch it because the girls are cute!").

His favorite music is The Electrical Parade ("I dance to it for no reason!").

His favorite movie is Armageddon ("[I] don't want to close my eyes!").

His favorite manga is One Piece ("I will become the world's best striker! Boom!").

His character color is salmon pink.

His best subject is PE ("Soccer! Swimming! Girls! Swimsuits!").

His fetish is girl fetish ("Whether they're pretty, cute, sexy, innocent, or bold, I love them all!").By the end of the Neo Egoist League, Sendo got a ¥37,000,000 offer from "Napolin" (ナポリン, Naporin?) [11]. Napolin is based on SSC Napoli.