(Creepy creepy creepy. How do we change the topic?)
(Okay, that is an acceptable change of topic.)
“Um.”
Think.
“That should work okay. I think you can do it” (without any extra eyes) “as long as you want to be a big griffin, so your head goes where its head is and there's room for the rest of you. Let me try—”
He starts pulling up the miscellaneous glass around and reforming his original bird shape.
(Better than torturing fish.)
Okay, so what do griffins look like? The body is — mostly a lion, he thinks? — and lions are light brown. Light brown pigment in the glass, for starters, done.
Head of a giant eagle. Eye position — tricky. No, wait, she's already dedicated enough to this to want to try to see through fish eyes. Okay, optics so forward-facing human eyes can look sideways instead. Disguising tints. Nothing to be done about blinking.
He knows being a quadruped in the obvious way is terrible for the neck no matter what, so put legs in the front legs. Big griffin. Feet aren't human, so hide the human feet in the knees. Eagle feet.
The hind end won't contain any of her (his, for now) body so it's just a lion-shaped shell, but that doesn't matter to how it will move. Put some ballast in for balance. Cargo space.
Wings. Eagle wings. She probably wants to look like a live animal, not just have the form of one, so detail the feathers and coloring. Feathers other places feathers go.
“How's this?”
He tries to adjust things. His mock-bodies come over to give him a look at his mock hindquarters. (The same skill that let make up an almost acceptable griffin on the spot is evident in their perfectly human appearance.)
Since she doesn't have much glass she will have to make it carefully thin and maybe load some unclaimed sand instead of glass in the back to get the weight distribution right (she can work on claiming it later), but it's still doable. If she insists, he will share his stores of pigments so she can get the coloring too. It's very, very faintly bluish, though, because the glass made from the sand was bluish.
He's still walking around as a bigger griffin for the reference. It's clearly not his dearest wish to be a griffin too, though.
And how is she doing with the eyes-on-the-side-of-the-head optics?
“I imagine you would like to learn to fly, next.”
“Okay. There are two ways to start. One is you learn taking off first, and you have to deal with the ground being right below you. The other is I take you up really high and you work on starting to glide while you're falling. That can be scary. Which way do you think you would like better?”
(She probably has, or she wouldn't be at all comfortable inside that griffin shape, but, safety, don't assume.)
He makes a thing that might be intended as an example: it's a cylindrical cup sort of like the eye casing, with another cylindrical part on the inside, but both parts have grooves and bumps that plausibly could be used to grab and turn them.
He shapes his so that it fits onto hers, and starts spinning the inside parts. This apparently useless activity turns out to be rapidly increasing the stored energy in her spinny thing — hundreds of times more energy in just a few seconds than she was storing using her muscles in the practice sessions.
She could direct it to flow somewhere in particular if she wanted.
He stops spinning it.
“There! You've got all the energy you can hold right now.”
“About thirty gigajoules. You hold more by claiming more stuff so you can put energy in it. That's one of the reasons why I keep more of me around.” The ex-birds wave a little. “But unless you're planning to do something really big, you don't need more than a fraction of that. I just gave you a full charge because I have a full charge and I have it because I'm overly fond of being prepared for anything.”