User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-114.142.170.11-20191120214811/@comment-87.14.182.73-20191206230221

Lint is practically sure after Issei fought Nyx (and even before that she joined the Church Trio and went to live in Issei's home).

My guess for the third angel is Griselda, we got an older sister and a mother with Kuroka and Yasaka, now it's time for a guardian.XD