I have reasons for all of them, but I'll start with "Astoria" - originally, I went into Arknights completely blind and put in my usual nickname of "Tori". I wanted to make it sound a bit more 'professional' after getting full context, and my usual name choice of Victoria was spoken for. So I spat out the name Astoria instead, which turned out to be an Old English name meaning 'hawk'. So it stuck for the hilarious irony. Her surname of "Frostulf" is similar; it's "Ice Wolf" in Nordic, and felt even funnier to attach to a character based off of a rabbit.

Astoria's actual birthname of Shanti is a Hindi word meaning "Tranquility", and is a stealth pun on her being a moon rabbit; she's technically named for the Mare Tranquilitas-