@Another_Astartes in japanese Fs and Hs are the same. Its also true for Rs to Ls and Bs to Vs. Its more commonly translated to Fs instead of Hs (ex, Mt. Fuji not Mt. Huji) but if the offical english says Houli then thats most likely what the author wanted. Though personally i do like Fooly better
I love how they have only released 1 volume in America and probably won't release a second volume. Thank God for translators to pick up where the American market left off.