Arlecchino doesn't mind taking care of you when you regress. If anything she prefers it over you running off to someone who might not know what to do. She has experience with running the House of the Hearth.

"You're so little right now, hm?" She asks rhetorically, just holding you close in her lap.

Why not? She's already the 'father' to so many others at the orphanage. Even with how stoic and detached she seems she'll always take care of you.