Len

Len Kagamine is a major character and he is the twin brother of Rin.

He was into bananas for a long time, but Rin is still into oranges. Len sometimes fights with Rin at times and usually messed around with Rin by using bananas as a weapon with a wooden gun (serious Diddy Kong reference)

When he was younger
When he was 11, he tried to fight against evil thanks to his sister's power, but he got beat up by Chara and usually Len got angry and used that banana gun he used to fight evil.