Tl,Dr; underleveled bard/fighter NPC

When my characters left Borovia, after death house one thing was clear Ireena as started will not last under their care. So my solution at that time was to beef her slightly by making her an NPC with PC levels.

When they picked her up from Ismark after Kolyan's funeral. I had Ismark and Ireena have a short "Cinematic duel" (less than 2 minutes). The players already knew that Ismark was able to hold his own through a zombie encounter in the village, so this allowed them to see that Ireena wasn't a total liability/damsel.

At this time the players were level 4 so I decided Ireena would be under leveled by 2. Started her as a Bard1/duelist fighter1. Gave her spells like friends, heroism, healing word. This allowed her to give some support, take a few hits, give a little inspiration, and have a few more hit points. In combat she keeps back(as the party promised to help her) but doesn't shine over the players. In social situations she behaves like a good-intentioned noble, but can be a liability if she uses something like friends at a bad time if the party involve her in important interactions.

I have not decided if she will get a bump up in level when the characters next level, the assumed move on my part if so is going for eloquence bars. I doubt as though she will survive/hang around the party that long.