Celia Diane Mas7er is the daughter of Church Mas7er and Andrea Williams. Church was just joking around, but Lord used his trolling abilities to make it that Celia was a real child, and Church didn't abandon her anyway.
She spends some of her time on the Luna, and according to Evo, is destined to grow up with a very odd life because she's in the Mas7er family.
When someone asked Church about Celia, he said "Let's just say she's a badass and we'll leave it at that, okay?"
When she was first born, Church didn't think she was his, because he wasn't supposed to have children. However, due to Church being a Spartan, she has inherited several abilities and disliking Lord. Church doesnt dislike her and actually cares for her.