Pata was Hermione when he was young, now he's Dumbledore.
Toshi is Neville (likes food, kind of awkward)
Taiji was Malfoy.
Beneath his multiple Luna Lovegood wigs and hats, Hide also carried Voldemort.
Voldemort threw him a wicked Avada Kedarva when he cut his hair, so now he lives in Sugizo, who got a tattoo of the Death Mark.
No idea who Heath could be, let's say he's Ginny Weasley.