A play on their genderbent names.

Shining Armor comes from "Knight in Shining Armor". A Chainmail Bikini is a type of armor for females often found in fantasy works. ( In realiy it would be pretty useless and clearly exists for Fanservice. ). Radiant for Shining.

A Chrysalis is the Pupa Stage of a Butterfly. A Moth spends its Pupa Stage in a Cocoon.

Cadence and Baritone are terms related to Music. Baritone is specifically a deep male singing voice.