That said,the main benefit of being adult is a simple realisation.
"The first step of being an adult is realising that treating something as "childish" is the childish part."
Considering there are still morons out there who would treat us comic readers as being immature despite the truth of the majority,I'd say we're all doing better then those folks.
I enjoy the small tidbit at the end he's helping her pass on/ascend. That small wisp.
Not enough authors add that small hint of closure in their 1-page/2-page oneshots.
Page 3, page 4...
.... did the boy have scars from trying to gouge his own eyes out?
I'm going through previous chapters, and I don't think any show this as clearly.
Edit: Yep, it's been a recurring theme throughout the series. Just never explained.