For some reason, Dokurou’s backstory doesn’t feel convincing. It lacks the impact that justifies, not just what Keima should do, but how this entire ordeal began. If I’m not mistaken, this arc started with Dokurou attempting suicide. And every time Keima failed to save her, she became a child, forcing that sequence to restart. And why was that? What does that episode have anything to do with hell or with Keima’s meeting?
If the Dokurou that’s with Keima is merely narrating the events of hell, then what timeline was it? Was it after the the current turn of events (Keima back-in-time arc) or was this before everything even started (which probably caused Dokurou to go nuts and commit suicide)?
The final phase of this arc is underway. After Keima releases the runaway spirits and have them infiltrate the hearts of the girls, Dokurou will be made to deceive Vintage for 10 years by bearing the “tags” for them. This eventually raises a new set of questions:
1) Was it ever mentioned why Vintage needed to cultivate runaway spirits in girls? If they planned to release them and have them enter girls with gaps in their hearts, for what reason was it? What does vintage gain from all of that?
2) If New Hell was infiltrated by Vintage, for what reason did Dokurou (Hero) instruct the devils to capture runaway spirits? If Vintage was pulling the strings of New Hell, why did they let her carry out such a task? Does this have anything to do with their cultivation scheme, as seen in the past arc?
3) What happens to Kaori? While there is a good chance that she’ll come back to exact revenge on Keima in the future, the fact that she knows about the devils may make her an unlikely ally. That or she decided to bitch around and join forces with them again.