I do not recommend Betta in a community tank. While individual fish can have different behaviours, there are the other fish to consider too.
Some of those being considered are small--Ember Tetra, Green Neon Tetra (if this is what the Green Fire refers to). Betta will readily eat such fish if the mood strikes him.
But on the reverse, all small fish have teeth, and characins have plenty and they like using them. The flowing fins of a sedate Betta can be like a red flag to a bull. The attempt to nip even if no nipping occurs can be stressful to the poor Betta. And Black Neon Tetra and Emperor Tetra are documented as nippers when the opportunity strikes them too.
Betta should always be stand-alone.
Now, going past that hurdle, there are some other issues. Some of the fish are slow cruisers (Ember and Green N tetra already mentioned). Emperor are not, they are more active. Combining sedate and active fish is not easy, as the activity alone will stress out the quieter fish. I have these fish currently, they are in separate tanks just for this reason.
Final comment about all this. Even if no actual physical confrontation occurs, either way, the fish can still sense it and get stressed. Fish release pheromones and allomones into the water, and other fish read these chemical signals. This can be highly stressful, and stress always means poorer health and early demise. One has to be careful putting together a community that will actually work.
Not really much different that humans, is it.
By the way, we have fish profiles, second tab from the left in the blue bar across the top of the page, and these fish are included. Shaded names means you can click that as a link to their profile.