That's not a symbol or something on their chest. That is literally them.
Name: Azure
Species: did you not read the title
Gender: No
Age: idk mane
Relatives:
Timothy (self-insert, also their owner)
Henry (the reason they're with Timothy in the first place)
Protector: Green Greens
Protector origin: idk mane
Protector ability: SHARP LEAVES
Protector stats:
Namesake: Green Greens (Kirby's Dream Land song)