Anima:
Just use the character's name.
SDXL & Pony:
Creates the characters from the yuri webcomic Bad Thinking Diary.
Each of the main four characters can be called out with their trigger word, but some extra descriptors may be needed to make the character stay consistent, here's a few examples:
btd_cho_minjae, red hair, braid, yellow eyes
btd_kang_yuna, long hair, black hair
btd_kim_minji, brown hair, brown eyes, short hair
btd_hye-ra, long hair, pink hair,
You can also leave out the character tags and it works as a style lora for the artist RANGRARI.