ovl_En_Ma1 is the actor for Child Malon.
Debug Rom Notes
ROM: 0xE56F4C (24060047) Receiving the Pocket Egg for talking with Malon outside of the Castle Gate.
ROM: 0xE57124 Text: (24050009) Play Epona's Song
ROM: 0xE5719C Text: (24050016) Learn Epona's Song