I wanna see, from PSII, Rudo using Musik to get the Dam key cards, which involves giving him 3 TP so he can cast it. (Didn't want to cause a spoiler for anyone that hasn't played PSII)
Since Rudo's TP addresses are always omitted on hacking guides, I always believed that those two memory addresses were holding some important data and had to be kept at 0 at all times.... Shows how wrong I have been all this time!
... also Anna indeed is capable of using guns, but apparently none are equipable. I guess you'd otherwise see a graphical glitch if the animation was missing or if the character wasn't linked with the animation. Which makes me think of the other characters who can't normally use guns... Hugh? Rolf? I don't remember them being able to equip any guns... I might recall this wrong. It would be nice to see if you can get any glitches by "force equipping" different weapons on characters. Like Nei using Nei Sword.
Hugh can use some guns (such as Silentshot), as can Kain and Amy. Rolf can even use the Bow Gun and Sonic Gun. That leaves only Nei and Shir. I'm working right now, but I can mess with it later.
It would probably be fine for most weapons, since the actual character animation is the same for anything other than guns and slashers.
The reason why Rudo's TP offset is missing from most guides is probably because, outside of Musik, it wouldn't do you any good without also doing what I just did (hacking the ROM itself and giving him some techniques)
But I won in this battle in my actual run (on my phone, so no recording) with the exact same setup: level 39, 10 Star Dew, 1 Trimate, and a bunch of Dimates. I did it once, and I'll do it again.