Yep. He goes by the name Mongoose!
Every family has that one friend. The one who somehow survives complete chaos. The one who volunteers for jobs nobody asked them to do. The one who somehow causes half the problems... 
And accidentally solves the other half!
That's Mongoose. 
He has absolutely no official job title. Some days he's a producer. Some days he's a roadie. Sometimes he's writing lyrics. Sometimes he's asleep under the mixing desk after too much lime juice. He's started arguments. Ended arguments. Accidentally saved the day more than once.
If you're wondering whether any of the stories involving him are true... Honestly?
We're wondering that too!