I can't remember, do we actually know for sure when the Rozen frame was first made? I've been thinking a lot of Vera-sama's Arcade Anima and I'm also hoping I can think of something to draw with Hush and Hey sometime, but it's been making me wonder if she's actually using the Rozen frame in-universe for it because the frame already existed, or if it's just a gameplay convenience because her older frames aren't playable and they didn't want a mismatch between the portrait and her model