Rune Sawada

Rune is a five year old boy and the younger cousin of Yu Akito. Though he is young he is under a heavy training regiment. He can constantly found by his cousins side being temporarily under Yu's guardianship.

Personality
Rune has a very cheerful personality. He tries to act cool like his older cousin Yu Akito. He is somewhat socially awkward with kids his own age having never really interacted with them. He enjoys spending time with Yu and loves his cousin dearly. He hates when people call him by his nickname "Chibi"