Fuyuhiko was born as the heir of Kuzuryu Clan and was scouted by Hope's Peak Academy as the Ultimate Yakuza. However, he believes that his talent is nothing more than just bragging rights. He says that he only has yakuza blood but doesn't have any qualities of a yakuza.

Ultimate Talent Development Plan/Fuyuhiko Kuzuryu

Fuyuhiko: The Ultimate Yakuza, huh...? I never thought I'd be a normal student with Peko...

Yasuhiro: "Hey, you're the Ultimate Yakuza, right?"

Fuyuhiko: "Huh? Yeah, so what?"

Yasuhiro: "I just thought you were pretty amazing! You look like that, but you're a yakuza!"

Fuyuhiko: "...What do you mean "look like that"? Say it. Depending on your answer..."

Fuyuhiko: "Maybe I'll let you choose which ocean I drown you in."

Yasuhiro: "I-I was just sayin' that a guy dressed up in a snazzy suit like yours has gotta be a yakuza!"

Yasuhiro: "Y-You're really handsome! You've got a martial artist's body and a detective's brains! Even among all the Ultimates gathered at Hope's Peak Academy, your talent is supreme!"

Fuyuhiko: Th-The hell is all this about...? It's fuckin' creepy...

Yasuhiro: "Normally I charge 1,000 dollars for two hours, but I'll read your fortune for a mere 800. It's an unprecedented discount... But me and you are friends, so it's okay!"

Fuyuhiko: "Since when were we friends...?"

Fuyuhiko: "Actually, all this is real fishy. What're you scheming!? Cough it up!!!" He was beyond irked..

Yasuhiro: "Well, of course my scheme is to flatter you so you'll help me!" He says earnestly???

Fuyuhiro: "...Huh?"

Yasuhiro: "A lotta stuff happened and now I'm being chased by some scary guys! But if I got help from the nation's biggest yakuza gang, then I'd be safe..."

...

Yasuhiro: "Wha–!? I told you everything! This must be the interrogation power of the Ultimate Yakuza!" He genuinely believes that..

Fuyuhiko: "...Are you stupid or something?"