Ring = Garling
Shank = Shanks
Crown = ???
So this pattern is still quite strong with Gunko, as Gunko means something like "military child", and the uniform she uses is typycal of those officers of the Japanese Maritime Self-Defense Force (JMSDF).
And the symbol of the JMSDF is an anchor:
I wonder if she's some kind of half-sister of Pranks, with some shady stuff related to Ginny (I hope not).
I guess Shanks' brother's name will be something related to Crown, since it is the last part of an anchor.
The Japanese world for Crown is kinda tricky, so you can even translate it to Krown, which is better than just Crown.