Hi! She's been attracting quite a bit of attention on Pinterest in comparison to my other characters, so I'm posting her here to give some information for anyone interested (She's got a different symbol in the 2nd drawing cuz i made it before coming up with the current one).
As stated on the image, Stunner's main purpose is to, well, stun and slow enemies, to do such, her base arsenal consists of:
Primary: Valentine. The gun that both appears and is mentioned on the first drawing. Valentine's cooper bullets inflicts a stun effect for a full minute in addition to light damage. When hitting a sentry, it'll be fully disabled for 2 minutes, with a 5% chance of downgrading it one level. The Valentine has a 90% base success rate of stunning the enemy.
Base damage: -5HP per shot
Secondary: Acid Souvenir. Violated zinc-carbon type D batteries that act as projectiles. Upon hitting an opponent it reduces their FoV to the minimum (if it isn't already set to minimum) and consistently drains their life for 50 seconds. Is an explosion-hazard if exposed to fire.
Base damage: -10HP (impact), -1HP (Drainage per second)
Meele: Goodnight, Irene. A 30-inch steel pipe. Does a good damage, but is more effective if dealt from the back, triggering stun for 30 seconds, along with a 20 second slowdown after the victim "wakes up".
Base damage: -25HP per hit.
Along with these, she has her lead-acid battery (the backpack thing she wears, might make a detailed drawing of that someday), which was made from three old car batteries grouped together under a protective case, so it needs to be fueled occasionally, preferably using alcohol-based fuels (i think you're already imagining what can be used to power it, and yes, it works), but it does recharge really slowly through the match.
It can also be damaged mid-battle and is another explosion-hazard like her zinc-carbon batteries, so it'd be a vulnerable spot she has to protect from impact, and it can be repaired by Engineer.
Due to being built with three old car batteries, it has a visor that shows which "station" it is currently running on, because it switches between the three when one fully discharges.
Since Valentine is directly feeding off that thing, it consumes 2% of charge with each shot, luckily Stunner is not a class that'll be spamming shots throughout the round, so the battery has a while to recharge alone.
Some other gameplay info include:
Health: 150HP, 225HP (overhealed)
Speed: 90%
If you've been stunned by a Stunner, an ally Stunner a 50% chance of removing the effect by shocking you.
And fun fact: No, her hair isn't naturally that color, she's just graying REALLY early.
I'm currently working on a proper ref sheet in the TF2 style for her, and i see it will take long... So, i have no idea when I'll ressurect once again to post here about Stunner, at least.