Sola

"'I have to be honest... I couldn't stand being the odd one out when it came to my kouhai. You suddenly became so strong, in a league I couldn't compete in by myself. Perhaps that is what gave birth to Sola in my heart... My desire to remain your Senpai, even though you two have grown so much.' - Mami to Kyouko and Sayaka, explaining Sola's birth"Sola (ソラ - Sora) is the Seraph of Mami Tomoe, appearing for the first time in the Conception Story, and then all subsequent stories following the Conception Story that Mami appears in.