Trigger word: perlica
In general, LoRA works well and for appearance, you can just write only the trigger word. There was a word in the markup: Perlik's costume, but I still didn't understand how much it worked, when I tested it, adding this word to the prompt got 50/50 either her canonical costume or its reinterpreted variation, let's say, so you can play with it by adding this word: Perlik's costume, without describing it yourself The suit.
Tips for prompt:
Appearance: perlica, owl ears, long blonde hair, bright blue eyes.
Costume: Perlik's costume, white sleeveless dress, white jacket with blue inserts draped over shoulders, dark gloves with orange inside, stockings, dark boots.
Full: perlica, owl ears, long blonde hair, bright blue eyes, Perlik's costume, white sleeveless dress, white jacket with blue inserts draped over shoulders, dark gloves with orange inside, stockings, dark boots.