Board Thread:Wikia Discussion/@comment-25683568-20150717101921/@comment-26107364-20150723071413

I'm in favor of Kai Ni just for keeping names in words (and that it's clearer that we mean "ni" not "two", even though I would still read Kai2 as Kai Ni, despite being American, since it's a Japanese ship/equip)

K2 is fine for abreviation