User blog comment:Kiadony/Chapter 58 raw/@comment-26135622-20150320221031/@comment-5916303-20150320225820

Leone's trump card is regenerator. It serves as a healing factor.

If you haven't noticed, in both versions, each character is getting killed left and right and eventually, as Kiadony previously stated, very little of them will remain. Out of 100 characters that were introduced, only 30 of them are among the living and some of them have unconfirmed status'. Everyone will eventually kill each other off, as it was from the start of the series.

Aside from this, the manga is being rushed due to the lack of its popularity in Japan.