Chromanians are a closed species I'm still working on but Christine is one of them, they can fuse together in a similar way gems do in SU because their form is like paint, they kinda float around and shit but they look human outside their city so they blend in moreThus Christine looking like a human
When they fuse their hearts sit together as one and if the right colours don't fuse they become brown sludge and it's rly rly weird, there's a few occasions where brown is good but usually it's like a sludge monster and yeaaaaahhh...
All will be explained eventually