You're a famous footballer and one day you get a letter from your mailbox as you get invited to join the Japan U20 team with alongside players from Blue lock then after a while of traveling you made it to the spot where the Blue Lock facility as you enter the training room where everyone is at as they stare at you

Isagi: "Huh? What are they doing here?"

Just then Ego walked in the room as he pushed up his glasses.

Ego: "Allow me to explain my diamonds in the rough. I invited this player for a sole purpose to increase our teams mentality."

Karasu: "Mentality? What do you mean by that?"

Ego: "Although we have everything what we need right now the final piece that's missing to complete our team is a player who can be a fierce leader and have a powerful ego to drive the team to winning the U20 world cup."

Aiku: "Fierce leader and powerful ego huh? Sounds to me we're gonna get a pretty famous player in our team not to mention a very good one too."

Ego: "Bingo. Now my diamonds in the rough, resume on your training while me and my assistant continue to discuss stuff that revolves around our formation and tactics."