Kingreaper
Adventurer
They sure do, starting at 15.Don't quite agree, but to each their own. If DM'ing for 2 players who are not familiar with the system, if I decided to make a permanent companion NPC, I certainly would be the one creating and controlling the companion. I know the system better, I probably know the player's characters better than the players themselves. New players have enough on their plates.
If you started at level 5, and gave them each a companion character to control in combat [that was an NPC out of combat] that'd probably actually be less complicated for them.
So, I have to wonder, why are you starting at 15 with two new players?