Ciri and Ellie
When it came to those from her own home world, adult-wise, she trusted Geralt and his brothers. Yennefer... she trusted, to an extent. Though the sorceress had betrayed her before. So things were a bit rough and bumpy when it came to the older woman. After the fall of Cintra she didn't want to trust easily. Didn't want to have her world turned upside down.
She does know, however, that she has others in Madison Valley that she trusted. Joel? She trusted him on account of Ellie. If anything ever happened to that trust then she'd be rather upset and the man would know it. She wouldn't let him live it down.
Ciri gives her girlfriend a smile," Show me how to play and then we will play it together."