Short answer is fish only tank.
:-/
Long answer is it may not be anymore disappointing than a flame angelfish.
Make sure you have a tank where you can catch and remove any fish forcibly if it goes badly.
(I need to use a food based fish trap in our tank and that only works with the aggressive feeders. Anyone shy or smart enough to hide stays and I have to live with it.)
https://m.liveaquaria.com/category/25/butterflyfish?c=15+25&s=ts&start=1&page_num=1&count=24
The pic you posted is interesting.
Nearly all butterflies have diagonal striping.
It doesn't look like any of the butterflies for sale at Liveaquaria.