Rosé's Child

Rosé's Child is the unnamed toddler of Rosé Thomas, introduced in the original anime series, Fullmetal Alchemist. The toddler makes a cameo appearance in the Non-Disney Villains Tournament.

Non-Disney Villains Tournament
The toddler is used by Dante, who sacrifices it, in order to send the Colonel, Van Pelt and Javert, beyond the alchemical gate, ultimatetly warping them into the Live-Action world.