this chapter right here, this is the one that really show the author as a competent writers.
there's many way to handle this climax moments, will Ono/Haruo comes as a pure fanservice? will we see Hidaka destroys her enemy completely (with her main, which in this case Akuma) like we've already seen multiple times in this series? will he make a callback fanservice of Guile vs Zangief?
nay, this series is all about Hidaka AND her students, both of their spotlight cannot be rob because their relationship is the core of this spinoff/sequel and so, he gave her Brown Ryu.
not only that, if Hidaka wins, NOBODY can have an excuse like imagine if she destroys with Akuma? like duh, whats so impressive about it? the fact that she need to pull of Brown Ryu is also a testimony of how strong she actually is.
she is the OG.