Capella

カペラ

A 5-year-old child who was sold into slavery by his mother. He is rescued by Teito and Frau as they flee the Barsburg Church, and joins them in their journey to the 'Land of Seele'. Capella gained the ability to use the healing style of zaiphon after being told by Teito that they were going to the Fourth District in search of his mother. from Wikipedia