[@White Feather]Now that I put two and two together, I see that Leagsaidh would be the best one to try and break Touka's icy exterior and bring her hidden heart to the surface.

this poem here says it all about Touka's personality.

Just remember in the winter
Far beneath the bitter snow
Lies the seed
That with the sun's love, in the spring
Becomes the rose
— The Rose by Bette Middler