You can do best friend edits.
And I read below that the person likes the color green so maybe a nature theme on or you both hiking in a forest or both of you picking flowers.
If the person has a story (as said below) you could do some edits like custom poses or hair for there story.
Orrrrr, if it’s a b-day or friendversary you could do a gif-animated video with edits in it, like dancing, or eating, or virtual hugs. With a message like “we might not be in person but here’s something’s I would love to have celebrated/ shown you.”
@Danielle318 you can make her a story cover or a intro for present/gift ideas and since her color is green you can make her character like hand drown but like dress be green or fair tale or something like her favorite thing she do and you can put it in background too