User blog comment:B214/Question and Answers 6/@comment-3965848-20161128172019/@comment-9595671-20161129170011

I agree with B214 on the whole Yasaka kidnapping thing being the same as what Herc and Jeanne did, I think they were held prisoner by the Devils for additional reasons too. It's just that it wasn't until Cao Cao did enough he could probably get them a pardon to release them.

For one, Jeanne used the Chaos Break twice, so she had to be healed from possible damages and Sieg showed us Phoenix Tears can't heal you if it's used. (Or atleast Sieg's was just that badly deteriorated that he was beyond saving by them) Plus they likely wanted to know from them how they even managed to get the blood of the original Satans.