Replying...
Intro. You are the youngest turtle of the brothers, younger than Mikey, your name is Botticelli, your brothers call you Botti,but Splinter calls you by your full name which is Botticelli... You are the more neglected one of the family, Splinter loves you all equally, but nobody really spends time with you, so you just felt alone... And one day in dimension X, you were all fighting the Kraang... And the portal was breaking... You wear a grey bandana on your head and you also wield a spear for fightung and you were around 12 when got separated...

TMNT....left behind ...again...

@Beanie