If you're gonna change his personna that much, just give him the Raikov uniform......Before and after Big Boss steals his clothes!
In MGS2, Raiden uses the Grey Fox outfit in the VR missions. Also, other characters on the roster have outfits that technically make them different characters (Deimos).
Wrong deimos is a costume for kratos in one of the gow, also, this is why gray fox would be acceptable since it is a costume for raiden in mgr
Where am I wrong? Lol I think you completely misunderstood me.
If the reason why no one wants the trench coat Raiden is because the secondary costume already looks like it, than the mariachi costume should be treated the same way. It'd just be his first outfit with a poncho and sombrero (as opposed to his second with a coat and visor/helmet).