• Usgai was with her friends, later in the day, when she was going home and saw a little girl and all the answers to Usgai's questions were "Chibi.....Chibi!" or "ChibiChibi!"

    later at night Usgai writes Mamoru:

    dear Mamoru.
    A little girl nicknamed chibichibi followed me home, and everyone is she's the forth child!
    heart
    Usgai