Title: Sun Arcobaleno, Home Tutor Hitman
Gender: Male
Age: 1 (as Arcobaleno)
Birthday: October 13
Height: 40 cm
Weight: 3.7 kg
Weapon: Leon; the shapeshifting Lizard
Flame: Sun

Reborn is the baby Home Tutor of Tsunayoshi Sawada, and whenever he greets someone, he says "Ciaossu," a casual male greeting that combines Ciao and Ossu. He wears a black fedora with an orange stripe running across the sides of the cone. He has black eyes and wears an all black suit with black boots and a purple dress shirt underneath.

He is always seen with his pet chameleon Leon on the brim of his hat, along with his yellow Arcobaleno pacifier.

Out of all Arcobalenos, Reborn is said to be the strongest.