Interaction - chat between Sarada and Himawari (Patreon)

I am working on scenes and scripts but also thinking about one think.

Is it importanat to actually create verbal interaction between Sarada and Himawari?

For now Himawari is kind of hidden in village/forrest and Sarada did not know about her so no new dialogs for Sarada. But I can add some to  develop her story and chain with Himawari. The question is whether or not it is necessary.

Thanks for support / ideas...