Kirin is a BPxFH cross and this is not a short body. It's a zz bonsai.
MonsterAquariaNetwork app
That does look more like my little fh.
a bit risky mixing it with gentle community fish especially barbs and also those severums. fh can be very2 aggressive when they start to get use to their environment and as they get bigger they will be more territorial. and i think it will get worse if u add any more fh to your 100g. but i would observe the fh's behaviour a little bit more, maybe a few weeks, to see if there are any aggression showed by him, and if it does u have to remove it somehow. btw, how long have u mix the severums with the barbs? no aggression so far by them?
The Severum have been with the gold barbs since some were 1" and they never bother with them, they ignore the FH and a pair of 2" dempsey that a mate handed me (soon to give them a dedicated tank), they assert authority over another breeding pair of Severum (Heros appendiculatus) but I am selling them as they are pretty rare in hobby, best let a breeder have them to get them into the hobby.
I have never known any issues with severum and any dithers although wouldn't risk neon tetra.