I create the artwork! This is Lia, and she is indeed a mixed-race spider/human by her parents, enslaved by the Celestial Dragons. I'll even do more if I can draw and add them up here. 

Name Monkey D. Lia

Age: 7-8 Months (Dragon found her when she was a newborn)

Appearance: Pink hair mixed with white, pink eyes, patterning small circles underneath her eyes, light skin, and hide in head buns mostly. She wears her pacifier sometimes and dresses up looking like a little princess. 

Nicknames: Sweetie, Princess, Honey

Favorite Toy: Stuff Toy Dragon (Below are Lia's belongings)

Parents: Monkey D. Dragon, Reader

Others: Straw hat pirates, Law (uncle), Kidd (uncle, Katakuri (best uncle), Koala, Sabo, Ace, Garp (best grandpa), Shanks, Luffy (best brother)

Abilities: Silk, web shot, crawling, extra arms (Only two more to come in handy), night vision, super strength, Observation Haki