I am!! So excited!! We were hoping for more Scions and you almost never see Y'shtola but she is so near and dear to my heart, I absolutely lost my shit when you posted. You're doing so well with her!

Like I mentioned in the TDM, Y'shtola is Himeka's intro Scion so she's very important to Himeka as well. (Emet brining her back from the dead was actually the turning point where she was like "oh okay you're part of the team" towards him until...well, everything else that happened.) I'm always happy to plot out specifics because I know things may change from WOL to WOL, but by in large she would take direction from Y'shtola pretty well and value her input on everything. (You can also assume that whatever the strangest dialogue option is the one that Himeka would have said because that's fairly accurate.)

Since they're in different factions I hope they'll get to meet up in Horizon soon! Himeka will definitely keep both Y'shtola and Thancred appraised of ongoings in the Commune. She has some ideas about rejoinings and the Singularity and all that BS that she does not feel qualified to pontificate on but Y'shtola is definitely someone who she would believe could figure out for them.

TL;DR I'm so happy you're here!