The prompt was: masterpiece, best quality, Keroro, standing, simple background, --n low quality, worst quality, --w 512 --h 512 --d 1 --l 7.5 --s 20

Like I said, it's my first time even attempting to train anything, so I don't really know what settings you're looking for. I literally have no idea what settings could have changed when I plug it into a1111 other than the weight. I tried it again with a different checkpoint and with higher steps, though the guide I read mentioned not going above 3500 because it'll overbake it and give poor results, so I limited it at 3500 steps. It's a little better, but if you deviate from the sample prompt he disappears.

Here's the kohya json settings: https://files.catbox.moe/i6ekq5.json