Stop apologising for life happening.
Though I hope you got all of those things sorted out with minimal fuss :)
So I get being concerned about friends and all but why was Mullet missiling down a pitch black cave XD
Gotta love great roleplaying moments XD
I can't help it, I'm part Canadian. 😅
So, the short answer is, its just the way he is.
The long answer... part of it was the growing "I'm indestructible" aspect of the character. Part of it is his survivors guilt caused by not being there to save his family. Mostly Mullet is stupidly loyal to his friends and will always rush headlong into danger for the sake of others.
LoL I guess that explains that XD I have a similar aged and similar personality character (all the way down to the survivor's guilt, I did make the tropiest most tragic backstory I could because anime themed game and also to make it as easy as possible for the first time GM to hook into XD), she at least subconsciously realises that she's not much help to anyone dead so she has a slightly more cautious approach.
that and being small she does need to figure out the quickest and most efficient ways to kill/disable people, while I did manage to get some amazing dice rolls that make her seem stronger than she is, she's the type that doesn't cope with taking hits but you have to be able to hit her, because of course she's mostly brawl/melee