Trained only on in-game images, so it probably 'a bit' overfit, but in my testing it still works fine.

Recommended lora strength: 0.6-0.8

Hibiki

Asc 1:

Character trigger

hibiki, orange hair, ahoge, orange eyes, short hair, 

Outfit trigger

maid uniform, white shirt, pantyhose, orange skirt, 

Asc 2:

Character trigger

hibiki, orange hair, orange eyes, long hair, age progression, ahoge,

Outfit trigger

miko outfit, white dress, orange skirt, black pantyhose, cleavage, hairband,

Chikagi

Asc 1:

Character trigger

chikagi, green hair, twintails, green eyes, long hair,

Outfit trigger

maid uniform, white shirt, pantyhose, green skirt, 

Asc 2:

Character trigger

chikagi, green hair, green eyes, long hair, hair down, age progression

Outfit trigger

miko outfit, white dress, green skirt, black pantyhose, cleavage, hairband,

Extra info:

May want to add "age progression" to negative prompt when prompting ascension 1.

When prompting Chikagi by herself, may need to add 'ahoge' to negative prompts.

Use regional prompter if you want to prompt both at the same time.