Reminded of the other comic (I think it was one of the "Manly Admiral" ones) in which Tone hails someone on the phone with "Ahoy-hoy," geezer style. :)
October 23rd
Telecommunication Day.
Hello, it's Ushio. Is that you, Admiral?
....
It’s me, it's me?
....
Ah, Tenryuu-san?
Using "ore" to refer to herself is a quirk of Tenryuu's... but it's also generically what men use.