[He studies the forming light with a critical eye. It holds right up until focus slips. To get the best sense of this he'll need to ask some more questions. Shiro crosses his arms over his chest and nods once, smiling just a bit.]

Yes. I could only hold it small amounts of time at first. It was about focus and how much shifting takes out of me. Do you feel...drained after forming light into a solid like that?

And more importantly can you feel the light shaping into what you want?