So this is Yvonna, and also the girl Dimitri likes. She is technically one of Dimitri's friends and spends time with him and the others but often gets pulled away by other duties she has outside of their friendship (school clubs, studying, etc.) Yvonna is somewhat of a perfectionist and uses these things to determine her (self) worth. Thankfully Ada Finn and Dimitri are encouraging her to see herself in other ways and she is slowly getting better at that.
Unrelated to Yvonna, a friend of mine gave me an idea. If you've looked at my previous drawings of my characters you can notice that all of my OC's have a distinct item on them. Dimitri has his scarf(that turns into a hat magic) Keenan has his hoodie (I know super creative) Elena has her bracelet, Ada has her choker, Finn has his bomber/aviator jacket, and now Yvonna has a heart shaped locket. Anyways, Dimitri has magical power that is accessed through his scarf and eventually the rest of them would be able to use these belongings to help Dimitri in his fight against Alaric and other evil spirits/monsters (all of them except Keenan who is controlled by Alaric a good amount of the time). Now these items all happen to actually be gifts from people that they each cared about, so the idea is that these items have to be filled with caring intent from another to be enchanted so the user can see and interact with the spirits. I think it's a pretty cool idea and I think I'll start implementing it into my thoughts and drawings of them. :)