I guess it would be okay for you to bring in your OC, vonboy. Just let me know what you are planning so that I can figure out a way we can fit everything together.
For reasons I will soon explain, I think it would be a good idea to let you in on a little history on how this RP has been going, specifically about how we've handled Chomper. When we started this RP, Chomper was played by one of the newer members (I forget who). Later on, after we had concluded that that member was no longer active, I took Chomper, since no one else wanted him and I figured that it would be easy for me since I already had Ruby. When day 1 in the RP ended, I asked Myrkin to take Chomper, since I could not figure out what to do with him, and his character, Claw, seemed to spend more time with Chomper.
The reason I'm mentioning this is because I have a feeling that you might want to take control of Chomper, since you say that your OC and Chomper have known each other for a while. I just think it would be easier to show that if you had Chomper instead of Myrkin. Of course, you'll have ask Myrkin if you could take Chomper.
As for why I would suggest this, my reason is that since I gave Chomper to someone, I feel like I have a say in what might work best.