Arina Luccini/Relationships

Nozomi Sawada
Arina and Nozomi were raised side by side with each other. Nozomi spent her childhood jealous of Arina's relationship with Nozomi's parents. Arina spends her time keeping an eye on Nozomi and making sure that she lives a life according to her father's wishes, however she still helps Nozomi out in ways such as finding her a Lightning Guardian in the form of Luca.

Luca Luccini
Arina and Lucas and are siblings, but they barely knew each other until later on in their childhood. Luca is overprotective of Arina and does not like to see her around boys. Arina, meanwhile, helped him out after his work with the army did not stick by introducing him to Nozomi. Arina is serious and does not enjoy Luca's laidback and often flirtatious nature with women, however they care for each other despite their contrasting personalities.

Tsunayoshi Sawada
Arina is extremely loyal to Tsunayoshi, taking his orders completely seriously and without question. She was the recipient of his praise as a child and believes in his stance that Nozomi should not be a member of the mafia and instead live a normal life.

Masato Fukada
Masato and Arina appear to get along well, much to Luca's chagrin.