User blog comment:B214/Volume 21 info & spoilers/@comment-180.245.181.231-20160619112031

What about Gabriel's fate after she heard that her brother Michael and other Seraphs seal themselves alongside with Maous, Azazel, & other Gods to seal Trihexa?

I think she's sad and crying that her brother and other Seraphs sacrifice themself to seal 666. Griselda and Dulio convice her becoming a Goddess or Michael's sucessors to control the Holy System. But she refuse become Goddess or Michael sucessor. If she's difficult to persuade, then what about Sekiryuutei Issei and his friends persuade her to become Michael sucessor.

{Sorry for the Grammar}