I think Kuulasi and my Rosalyn would get along well. I'd also like to offer my Eleanor for Kyrr. Both of these offers are just for plots and RP, since Eleanor has a poly group and Rosalyn (while bisexual) might be a better adoptive mother character for Kuu.
Rosalyn was ostracized from her herd due to her regular breed type and when she was old enough to live on her own (by the herd's standards) she was forced out. She too found a garden grove in the western forest and kept to herself for a while, finding solace in planting roses and sweet-smelling plants to keep her calm. As it turned out, when other a Soquili came to her grove, they liked the scents too and so she started learning what she could about aromatherapy in order to help others.
Rather motherly in temperament, I think Rosalyn would be a good friend for Kuu, and maybe be able to open her up a little. At the very least, they could exchange gardening tips. xD
My reason for offering Eleanor for Kyrr is a lot more basic: she's incredibly talkative. So long as Kyrr doesn't mind hours (days, weeks, months...) of storytelling, gossip, fun facts, and a bunch of boring conversation too, then they might make an interesting pair of pals, since Ellie would only need a "yes" or "no" answer from time to time telling her to stop talking or not.
Interested?