Calcara

Calcara (カルカラ, Karukara) is the youngest brother of Tetra and the only son of Teto and Calra.

Calra
Calra is Calcara's mother and as a baby, he is attached to his mother without really being aware of it.

Tetra
Tetra is Calcara's older sister and he accepts his sister by giving her a smile and he lets himself be carried by her without crying.

Sariphi
At first, Calcara refused to be touched by Sariphi but then he accepted Sariphi without crying.