I recommend getting a couple Certificates of Ownership and altering the names of pets that are named after players. It will make things a little less awkward for you and make the pets more your own.
Since the certificates have a 7 day cool down, it would take a while, but I think would be better in the long run.
If you are really planning to use two devilsaurs as stand-ins for each other, I would name them the same name. I had a black one for a while named "Walnut"...reference to the movie Up and Away...I like that name for a devilsaur! Or, I've thought "Tyrannus" would be a nice name for one. Sounds big and fierce!
For Gondria and Loque....you said you were feeling uneasy about naming them after other players. So, change the names. It'll be less awkward and make them more your own. Just go with a name that feels right but isn't another player.
You said Loque is named "Azus" right now, which is your friend's (ex-friend?) name. Maybe something descriptive with the same "feel" to it, like "Azule" or "Azure" which both mean blue and might suit Loque. There's also "Aziz" which means "powerful" in Arabic.
You said your Gondria is currently named Katsuro, which you said is your boyfriends name. Its a good name. I looked it up and apparently it means "victorious son" in Japanese. So, I don't know if it's the sound of the name or it's meaning you like...so...some thoughts. If it is the sound, how about "Katsuo" which sounds a lot like Katsuro and means the same thing? Other nice names that mean "victory" are "Jaya" "Jayashri" and "Nicodemus". Of course there are more, but at a glance those seems like good Gondria names to me.
Good luck and you will work it out somehow, I'm sure.
PS I really enjoy the art you post! Keep at it, you've got talent.