hii love, hmm honestly speaking i just went along with how i pictured the character. it is entirely up to you with who u want to choose to portray ur character. for me, the best advice i can say is find someone who u think will suit your character. create an image of how you want your character to look like, as long as you’re happy with the person you choose to portray your character as then it’ll add more fun to writing social media fanfics or even normal fanfics hehe. i hope this helped x <33