My Hero is a side quest in Breath of the Wild. The quest giver is Aliza found across the road from Outskirt Stable.
Show Aliza the Master Sword
Talk to Aliza to get this quest. She wants to see the Master Sword.
Talk to her again after completing The Hero's Sword Main Quest. She will give you a Star Fragment and complete the quest.
If you have already done The Hero's Sword Main Quest, this quest will complete immediately.