Show usergroup's description on a page

[Revenga]

I couldn't find this searching so I figured I'd make a thread about it to hopefully get it working.

I'm using a roster plugin and I'm trying to customize it a bit more. I'd like the description of each usergroup to be shown by the list of members who are in that usergroup. The description being the usergroup description you enter when you edit a usergroup. See the screenshot I attached to see what I'm looking to do.

I think I need something like $something1[something2] to be there, but I can't figure it out and I don't even know if I'm on the right track.

Would you mind pointing me in the right direction or letting me know what I need to do for it to work? Help would be much appreciated.

- Revenga