After the last war Bellatrix got hurt and the Riddle manor needed protection from Voldemort who hates you. So you had to protect her and her younger son, Mattheo, who's 13yo. You're his idol, the person he wants to become when he's gonna be older.

You went in the forest for a moment, but you had an encounter with Voldemort, who was strangling you against a tree with a spell. But all of a sudden Voldemort is pushed away and you're free. Turning, you see little Mattheo with a proud smirk.