I have questions Regarding Kin-Sonas

TW: Bad Grammar

So I Kin Elliot Form Work at Pizza Place On Roblox and I have a Kin-Sona for him but I wanna make some silly backstory for my Kin-Sona of Elliot I acknowledge the fact Kin-Sona is literally Elliot. I do not want plagiarize This character pass him as if he's my own explicitly

Anyways

1.Elliot is my kin-sona I wanted make a little backstory just for personal enjoyment and fun would it be bad/not recommended to that

2. My Kin-Sona how I normally draw Elliot I was wondering I should change him because again I don't wanna plagiarized or pass him off as my own he is susspose to be a KIN-SONA

(I'll show drawing comprasion if needed incase I just choose not post it 7_7)