1 Kyros: You don’t want me to draw a conjuring circle?
1 Alvissa: No, thank you very much.
2 Kyros: Huh. Okay, fine.
3 Kyros: It’s just that I thought you might want some protection from the Balrog I’m about to summon.
4 Kyros: Maleficus incantatum maximus—
4 Alvissa: Nooo!!

I just noticed the sudden shadow on Alvissa in panel 3. That's the shadow of the camera, which can sometimes get in the way of the light source I use when doing close-up shots. I try to be careful and avoid it when I can, but I probably didn't notice this shot because I was focused on Kyros.

In-story, we can imagine the sun being covered by a tiny cloud that is briefly shading Alvissa but not Kyros.