1. Yuugo Clay's name inspiration came from a shortened name of KR Kuuga's protagonist (Yuusuke Godai -> Yuugo) and Claymore-> Clay. Personality wise, he has the essence of a certain half-boiled detective
2. Phi Clay's name inspiration came from Shotaro's partner, Phillip -> Phi.
3. Melt Epee's name inspiration came from Melt (a song's title.....most likely that Miku song) and Epee (sword). Her overall design are inspired by Cure Sword; and her personality have elements from Cure Dream and Cure Happy.
4. Marcos Bolg's name inspiration came from Gae Bolg (as contrast to Clay...more) combined with that crab enemy from Ryuki and.....Revolcane(?!). There are more details about Marcos, but that would indirectly reveal arc 1's plot, so i will end that there.
5. Yuugo's Blaster armor initial idea take inspirations from Kamen Rider Black Sun. There are more details about the armor, but that would indirectly reveal arc 1 and arc 2's plot, so i will end that there.
6. Zenon Ash's name inspiration came from a chuuni-like name and Ash as the last name. Basically what players would usually settle the name of their MC in a game
7. Claire Rouge's name has no definite origin, but personality wise she is the amalgamation of your common heroine's quality