I hope you are right. The game seems to be going for Rose x Groth right now, but to be fair I love Rose so I wouldn't mind that outcome either.
well it might not be that way, they might just be interested in having fun instead of romance because Groth also gets flirted with by Viccoria if you save her and I think he flirts back. also she has a second potential partner in blackwolf since it seems like she had a thing for him from when she talks about him.