Lucem

Lucem(光,Hikari) is a Familiar Spirit that is owned by Riku Hatsu and the only spirirt he owns Lucem is specialized in Light Magic and is capable of doing fusion form with Riku

Appearance
Lucem resembles pure light taking shape of a spirit  he has somewhat yellow hair tied, because of his small size is why he prefers to fuse with Riku because of his size.

Personality
Lucem is an obidient person and of course calm like his owner he's like Riku's counselor that helps him take choices even though they both are good friends also Lucem will do anything for Riku showing how extremely loyal he is.

Magic Abilities
Light Magic: He can use Light magic as it is his proficient magic  since he's so small he prefers to transform into light and turn the enemy dizzy he can beat weak opponents but not strong ones.