Evelynn x Kai'sa headcannons please
Evelynn buys anything if it made her think of Kai'sa, so she has gotten her leggings, perfume, hair accessories, makeup, etc. Sometimes she would give Kai'sa as many as five bags to eight bags worth of content.
Evelynn purposely slacks in dance rehearsal so she can get private lessons with Kai'sa afterwards.
Kai'sa likes making homemade gifts for Evelynn such as a knitted scarf. She has also made customized stickers [cute chibi versions of them, deers, little imps, panthers, a variety of choices] Evelynn to put on her cars.
Evelynn likes to eat her food in small portions. For example, she will cut up her burger in quarters so she can eat it. Kai'sa goes out of her way to make her portion size cut in smaller pieces for Evelynn. So if Kai'sa was making chicken curry that night, Kai'sa would cut the chicken, carrots, potatoes, etc into smaller pieces for Evelynn's dish.
Evelynn doesn't like working out but she'll do it with Kai'sa, but she has to look good in her workout clothes.
Speaking of clothes, sometime Evelynn tries to match with what Kai'sa wears. Sometimes they are color coordinated or their outfits compliment each other.