It's a Unity Rose. It's the color of the Holy Flame, and represents the peace and harmony we'll have when the Children of the Cathedral helps everyone in the whole world become friendly and strong! Uh, do you want one?
This child is under the supervision of Mother Jain. Before coming to the Hub, he has been in the Cathedral itself, and thinks that everyone there but Father Lasher is kind. He can be found in the Children's hospital, near the Water Merchants.