To learn the history of his current familial relations, one has to be able to talk enough to get him comfortable to speak. His biological parents are deceased. Has been adopted into a new family. Family spoilers will be updated with new information should someone manage to reveal it from him. Check back often!
And I do think we earned the first little smidge of current family relations. Dig deeper and don't be afraid to interact with the new inklings. You may find something new to talk to Coerulus about.
edit: we finally got ourselves a name! also will write in the
dark blue inkling but ya still gotta ask for his deets. and i did some doodles so everyone can get a look at the squid behind the names. dark blue inkling will come once you figure him out.
Marigold Inkling
Name: Illex Radiata Feathertail
Relationship: Adoptive father, referred to as "papa" by Coerulus
Personality: Quite nice and wants to see the best of his little squid.
Appearance: He is of average height for a adult squid. With his tentacles rather long for a male, he keeps his tentacles untied. He is fond of casual wear, mostly sweaters and jeans.
Dark Blue Inkling
Name: Unknown
Relationship: -psst...try asking Illex-
Personality: A fun loving go-getter loves to tease Coerulus with playful banter.