Elsha

Elsha is shown to be a friendly and pleasant person as she politely greeted Issei and Ddraig. It is revealed by Ddraig that she is one of the previous hosts that he was closest to as she and Belzard were always supporting Ddraig from the depths of the Sacred Gear after they died. She is shown to be caring of Ddraig as he seemed sad over the fact that they couldn't show themselves often, while also caring about Issei such as comforting him when he felt powerless after his fight with Cao Cao.

She is shown to be wise as she was able to instruct Issei about the past of the Red Dragon Emperors and his own growing possibilities.

She has also shown a mischievous side to her personality as well, with her greatly enjoying Issei's Oppai Dragon show and telling Ddraig not to be depressed about it.

(Source: High School DxD Series Wiki)