I have a what if idea for isagi like what if isagi was aiku little brother where his eyes are a form of predator eyes but it will be like a Medusa eye where he make players freeze in pressure when ever they look him in the eyes and can make goalies freeze, It can turn him into defender or a striker and it can even be a one shot where he’s in u20 team with his brother and he’s a striker since aiku couldn’t become a striker after his coach ruined it so aiku motivation could be to make his little brother the number 1 best striker like how sae and rin are. They can be with each other in the same team working together or a series what if where they are against each other in the u20 and it can work by isagi going into blue lock because he wanted to become the number 1 best striker for his brother but later on he awakes his ego and does it for himself and if you want you can make him have a chemistry with rin since they both have brother issues and form a dangerous duo together or they go against each other like usual or where they work together but then isagi stabs in the back by scoring a goal for himself like a snake letting his ego show. Also great video I hope I can see more blue lock what ifs
I think isgai ability are pure instinct give him a good shoting technique like kasier imapct and his main weapon are briibring and speed and his shotting technique should a rival to kasier. Impact and vision should like his cannon and his special awareness of his canon self