Currently the 'protagonist' of Kantai Collection, the Admiral, has his own tag in admiral_(kantai_collection). This tag has an alias that leads to it: the Japanese version of it, "Teitoku". Thus, we have teitoku_(kantai_collection) -> admiral_(kantai_collection).
In light of this, I propose that the same be done, at least, for the protagonists of Azur Lane and Girls' Frontline, the two most popular (I think?) games which refer to their protagonist as Shikikan.
create alias shikikan_(azur_lane) -> commander_(azur_lane)
create alias shikikan_(girls_frontline) -> commander_(girls_frontline)