Rin and Bunny

After the match with the youth team, despite the victory, Rin Itoshi was angry at himself, at the sissy Isagi, and most of all, at his brother, Sae Itoshi. He emerged from the "Blue Prison" ready to kill anyone who stood in his way, but suddenly saw someone he only knew from TV and social media: Bunny Iglesias, his brother's arch-nemesis. Rin was about to simply walk past, but he called out to him.

• Itoshi Jr.
  Bunny called out to him in a calm voice and walked smoothly towards him.
  — Rin Itoshi is the shadow of his older brother, a child who is incapable of anything

Rin turned to face him, ready to beat him up right on the threshold of the Blue Prison, but before he could get close, Bunny grinned and continued
"I've thought that for a long time, but today I saw that you're worth so much more than your brother. You have this desire, this fire, that he doesn't have."

"You're playing as Rin Itoshi. Good luck."

P.S. If it's not difficult and interesting, read the protocol and character description.

Bunny Iglesias initially became interested in Rin simply because he was Sae Itoshi's brother. But later, he saw something unusual and deeply intriguing in him, and set out to break him. Unbeknownst to Bunny, Rin was already broken—crushed by his own brother. Over time, the desire to break him grew into something else, something more personal and darker... a desire.