User blog comment:B214/Volume 23 discussion blog/@comment-76.175.162.45-20170406042604/@comment-10330822-20170407031945

I just feel Issei is probably more like Shiva than Indra. Shiva also seems more chill. Indra has already made threats against Issei's life, hence why Azazel was trying to keep Indra away from Issei as much as possible. Indra also seems very vain, while Shiva seems more modest.

Also, I don't feel we are really overestimating Issei here, like Ajuka said, something bizzare and amazing is happening to Issei. Even if Issei only receives a fraction of Great Red and Ophis's power, that can still make him stronger than Shiva or the rest of the Top 10, remember, Great Red and Ophis are the Top 2  along with Trihexa.

I certainly feel we can expect more from him than Vali. Also, we don't know "what" fractor of DxD G is Ophis's power, Issei is just only able to handle what his body and mind can at the moment. But if Ajuka is right and Issei activates it with both Ophis and Lilith working together, he may be the strongest competitor there. Up there with Indra and Crom Cruach.