Kotomi shuffled to give Sunset sitting space, which probably had to be quite a bit, since she would probably get a little too close to Kotomi's buxom body nonetheless, either sharing a seat or above the water within shoulder distance. It becomes a little hard to tell what the blush is for, after Sunset mentions Twilight's good words on her.

"Hn! I am more than happy to be friends with her. She is really, really intelligent and kind. We read together, we spend time together..." Kotomi put a hand over her chest, closing her eyes as she contained her own glow, "I think... she was the reason I got infused with a start in magic. I'm still managing it, learning about it and treating myself to channel it well. I think getting a crystal myself would be a big investment for now."

She then smiled to Sunset, offering a hand under the water, "but I would welcome a top-off..."