Same. I hope Shiruton Doruyanikya shows up in the flashback. I always had a headcanon that her Kidd and Killer were a trio of friends in the South Blue lol.
I also had a head canon that Kidd made Killers punishers and mask for him
I'm pretty confident that Shiruton will be an important character in the flashback.
I still consider the theory you made (about Kidd's mother being killed during Rouge's chase) highly possible to happen.
When it comes to Kidd childhood, I thought that Kidd's hobby about collecting weapons could come from his old days when he was forced to possibly fight in a war, sort of like an orphan young mercenary. Killer doesn't seem like a real name, more like a "nickname" that he kept official, possibly by being an orphan too and a child soldier too...
Killer is a lil older so I can see him being the most reserved and most lethal out of the child soldiers (the reason of him being called Killer), but starting to be inspired by Kidd's
"the newbie" charisma and strenght,and deciding to follow him and becoming the partners we see now. Kidd receiving his "Captain" epithet nickname from all the infant
mercenaries, provong his conqueror will since well before his entrance in the pirate world...
I think that this theme (war crimes, baby soldoers, orphans who growed up as brothers) would fit well with them.
We should always remember that Kidd made his entrance in chapter 500 talking trash about the scumbags who run this world... and a bloody childhood passed fighting cause of the whims of a noble
could be legit for his words.
There are so many possibilities for Kidd & Killer flashback... but I'm sure of 2 things, maybe 3:
- It will be tragic, like real tragic
- It will long,
at least 5-6 chapters and possibly combined with the flashback of another character, which brings us to the 3rd point...
- Shanks could be
that character who shares the flashback with Kidd