kinda new to this whole thing but all the generators ive tried so far seem really bad at making a more niche character is there any way to improve that or is it just because theres not enough original images to base an ai off of

i was just messing around with one of the character ai things and its like yea ill make an image for you and like decided half the inputs for it and i was honestly kinda expecting it to actually put it through a generator

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https://preview.redd.it/t4yzkjnwn5ta1.png?width=560&format=png&auto=webp&s=054358d2e83d13aa3011bce7a8754f209d7133c7

just wondering if theres any ai that can actually make niche characters that arent just generic horny bait or super popular stuff