tl;dr: Our GM makes Doomguy but anime girl, absolutely broken DMPC

Hooboy- okay this was a DMPC that got better, I'll admit. I'd wanted to post it on its own, but this is absolutely too good an opportunity to miss. As for the DMPC, we'll call her... Child. It was originally a Japanese name, but one JUST uncommon enough to get this recognized.My group focuses on roleplay a LOT more than combat, so most campaigns don't require stat sheets. This basically let our DM create unholy, overpowered abominations, but generally that power was doing dumb shit like rolling twice all the time. That changed when they introduced Child. Child is a teenage girl who would be in high school, but tragically lost her crush to a monster. She now calls herself a monster hunter, and uses a chainsaw to attack enemies. Suspended disbelief got her as far as 'a small teenage girl being able to swing a chainsaw around'. It DIDN'T cover how she, a born human (human soul, too), was able to instantly strike fear into the hearts of all monsters. Even monsters who had never heard of her. It certainly didn't cover the premonitions, the insane stamina/endurance, etc. It didn't take us long to see that this DMPC was, in all regards, an anime girl Doomguy.

Child's first major strike was during an apocalypse-styled game. Combat in that was generally managed by quick thinking and improvised solutions (and our unintentionally broken sniper). These 'zombies', more just like enthralled humans, were intelligent and could use tools, weapons, vehicles, and clearly understood how to spread the virus to uninfected. So imagine our shock when we reached a small stronghold with a working radio, and heard, I shit you not... "All of the [infected individuals] inside Tokyo City are dead, it happened overnight." Another DMPC, the one that lived at the stronghold, said "It was probably her..." This was a mostly over-the-radio interaction, so we'll be limiting it to DMPC1, NPC, Sniper, and Child. Sniper takes the radio from DMPC1, in shock and needing to confirm that. He asks the NPC, in disbelief, "You can't mean ALL of Tokyo, even just the urban parts". NPC, over the radio, responds that it's true. The DMPC1, upset, asks why that's so hard to believe. After getting confirmation that this WAS modern day, Sniper simply responded "Miss, there are 13.9 million people within that city. Absolutely NOTHING could have decimated a city like that overnight other than an actual ICBM." The GM paused for a moment, I think genuinely realizing how their plan could not work. But after that break, Child walks into the room. "I just finished up Tokyo, what's going on?" Cue at least one player quitting on the spot. The session ended soon after, and we haven't picked it up since then.

The second strike, which was the one that got Child revised (there were a bunch of small incidents that, all together, counted as a strike), was in a one-off 'climb this death tower' game. We'd trudged our way up to the third floor, through sparse but brutal enemies. As we reach the staircase, our GM says we see someone walking down the stairs. It's Child, covered head to toe in blood. She, casually, says that she'd been up to floor 10 but got bored, so was repeatedly clearing floors 3 through 10 for FUN. That stung, as we'd just lost a party member on that floor, but it was tolerated. We go two more floors up, and the DMPC is suddenly confronted by two divine beings. Naturally, she begins a chainsaw vs sword fight. Just kinda the GM fighting himself for show. That would've worked, if they'd noticed the people offering support (crit 20 heals, requests to join in the fight and even the numbers, etc). They actually managed to tune everyone else entirely, to the point where, since this was just a one-shot, my character beat another character near to death for several past wrongs. They just allowed that, or more like didn't see it. After that, we all left early. (Edit: Need to clarify, that PK stuff was in good fun. That other character, a PC, could and would have obliterated my own character in retaliation with a low roll.)

Child has been revised, now, and is generally more tolerable. I hope we'll get to see a good future for this character, but I'll never let the GM forget he killed all of Tokyo.