hmm. I guess I go Fighter/Druid most often with her. She's been a druid since she was a child and taken in by them after her folks (noble family) were killed and a multi class fighter since the first game. Her backstory is fairly well known so if you're going lore/canon it doesn't really leave much leeway. I think she was originally a druid and then met her husband who was a Harper, and the two travelled together so she kinda became a Harper by default and stayed with them after he died. I think the Harpers gave her life structure and meaning after his death even if she didn't always agree with them. She's one of several elected High Harpers that kinda operate as a governing council but the Harpers in general are a very loose heirarchy and I never get the feeling with Jaheira that she would appreciate a rigid and formal structure cos she values free will and expression. Several times in game she mentions she has left the Harpers and come back and although I have to guess at why she left as its not mentioned I would imagine it was orders she didn't agree with or a route the Harpers at the time were going down that didn't sit well with her or possibly simple exasperation that things were taking too long. As to the Bard side of things, I think it would work somewhere in the mix, Harpers have a belief that knowing history is a necessity to understand the world and the politics of their times and in Dnd that's primarily Bardic but conversely there's no reason she couldn't just be highly interested and done a lot of reading to have History as a skill set rather than being a Bard multi class - same thing with rogue skills, which are normally the first things I give her cos stealth for the win right
Personally I don't think her age is a drawback, she's not so old that she can't fight. Reading her opponent and understanding the battlefield, being able to spot weaknesses in who she is fighting - all stuff that age and experience would aid in would likely make up for any slowing down caused by her age, plus she's a half elf, age is less of an issue in the first place as she's not elderly in the sense we would think of it. For some reason BG3 has her as partially suicidal in set battles where you aren't controlling her but that's just bad ai. Personality wise I go with loyalty to friends and very pragmatic, whatever gets the job done with the least losses is her preferred result. She has realistic expectations of people and the world due to experience.
