He was suckling on his pacifier patterned with stars, playing with his knight figurines and dolls. He's never had a chance to age regress properly due to the amount of shows they had to do, but after that, Rui basically was becoming a full-time papa for the cute little star.

Tsukasa spots Rui walk in the room, and removes his pacifier to talk.

"papa! papa!" Tsukasa giggles, doing grabby hands for Rui once he had walked in. (hes around 2-5!)