Norville

Norville was the previous Necrozma before Nick.

Character: 

He was considered a "creep" towards the people of Alola, but he was looked up to by a younger Nick. He's a calm and content person, and prefers to stay in the shadows than being recognized. He was killed at some point before Nick became Necrozma.

Job:

It is unknown what Norville did as a job besides being a legendary.

Family:

He might have considered Nick as one of his own.

Relationships:

He was really close with Nick, and enjoyed his enthusiastic attitude, but once Nick grew up, he started his troublemaking ways. Norville did choose Nick to be his successor, even if Nick was a bad guy, and had malicious intentions.