Yuno Gasai from Mirai Nikki (Future Diary) and Yandere Trance trained on 48 and 29 images respectively. I'd recommend coupling this with the crazy expressions lora if you really want to get some good yandere expressions.

v2.0

• separated Yandere Trance from the main Yuno Lora

To generate Yuno, use the gasai yuno trigger word. She can be generated with three of her outfits:

School uniform: school uniform, blue shirt, blue skirt, knee socks, loafers

Casual outfit: white cardigan, black shirt, denim skirt, loafers

• You can use extra descriptors like ponytail, collarbone for more consistent generations

Bikini: green bikini

Only use the tags that you want visible in the generation. i.e. don't add the loafers prompt if you're generating an upper body shot

v1.0

To generate Yuno, you'll always want to be using the gasai yuno trigger word. If you want to generate her in her school uniform, you can use yunouniform on top of that. Of course, you can also prompt her with any (or no) clothing as well.

You can also generate the "yandere trance" expression by using yandere face. I'd suggest that you put gasai yuno in the negative prompts as well to stop any potential bleeding unless you're planning on generating Yuno herself.