She has a couple people that she is friendly with, but not a ton of friends.
@VamipireMocha's Jez is Kaibette's bestie in my canon, but that was built up over almost a year. She's hard to get to know.
I think Rough and Tumble would fit into that friendly category, erring on the side of siblings.

Those who know her Lore know that she has a bit of an alternate identity when she disengages from her cold exterior. She goes by Kii and is generally very sweet and nice. However, her relationships are still usually surface level. Small talk only, no one really knows a lot of details about her. Most importantly, she keeps Kii completely separate. If you know Kii, you do not know Kaibette. If you know Kaibette, you do not know Kii. To everyone else, they are completely different people and not connected at all.