What is Talon's identity? What does he do?

In reality? Kill shit in under a second.

In theory? AoE assassin.

To 1 shot the carry.. Once you've done that your job is done. If you are lucky, they have a mage-like, squishy support, and you kill 2 or almost both.

I've always seen him as the flanking Assassin.

the assassin who brings aoe damage is no longer here after his ulti nerf, he is just now like other assassins but without escape

AoE assassin

Doesnt mean hes good at it

Assassins are supposed to receive a group rework next year.

You can ask the same question for Akali vs Diana for instance.