As much as Yavanna doesn’t need them to play as bodyguard, they’ll do it anyway: She is Kili’s little sister, the love of Legolas’ life, and a daughter-figure to Saeril. LoL
I planned for that, indeed. He’ll speak more often, but at the moment, since after Yavanna survived the fall, he’s kind of more focused to be on the look out, so he doesn’t lose her again. He would most-likely be in his protective state, but perhaps with her to talk to him, after some time, he might start speaking again.
Sounds good! It’s best to have a plan to create a kickass movie moment! :)