User blog comment:B214/Volume 22 spoilers/@comment-187.195.231.221-20160727171101/@comment-1359322-20160728032100

Vali is only a small team in the Khaos Brigade, Ophis isn't only a figurehead, she used her snake to power-up the members, so her involvement is greater than Vali.

And don't forget now that Lilith/Leece is at Ophis' side, people with evil intention may kidnap both of them and make them merge into 1 being again. It's not hard to have Ophis and Leece obey them.