[@LunarisDaFox]
That should be good! Thank you so much for joining! :)

[@Huggo]
Hmm, it might work with the lore. Perhaps your demon lord trains an army in Hell and one of their powers is to summon three or four of the demons they train onto the surface. It would be for a limited amount of time before they disperse back into Hell though. If it worked something like that, that would be fine. As far as age goes, any age really is fine. Most demon lords are very old  because they had to spend time amassing that much power. However, it is possible that your character was created by a sufficiently more powerful demon lord to face off  with the Forsaken.
You can go ahead and post your character sheet right here in the OOC tab so I can get more of an idea about your character. So far, that idea sounds great!