"Squaring the accounts and washing away the blood spilled, the Requiem Rain"
Rarity as Yamamoto Takeshi [link]
Yeah I'll admit that I ran out of ponies here. You could say that Yamamoto is generaous becasue he gave up baseball to help Tsuna. Who cares, Rarity has blue magic and he has blue flames that's close eough. And I'm choosing them going mostly by the guardian role rather than personality.