>>49638110
you aren't supposed to train them AFTER starlighting them in subsequent NG+s. if you train a girl, starlight her, move onto the next loop, and leave previous girls at level 5, it shouldn't be a problem. 1000 loyalty = 1 level in the internal calculation.
>Hikari has 340000 Loyalty.
looks like you're gonna need to repeat the process with the other girls :^)