I don’t know what to do with her

Bold Fighter fodder.

I saved one W!Lissa because Lissa was Awakening's best girl. That said, Bold Fighter is the perfect B Slot for a Defensive Team. Give Bold Fighter to OG!Hector with Bonfire. Give Zelgius/Black Knight Bold Fighter and Quick Riposte Seal. Your Defensive Team now has TWO units that will double on both Enemy and Player Phase, as well as trigger their Specials on most Enemy Phases and is guaranteed to Trigger on any Player Phase excluding Wary Fighter and Breaker Skilled enemies.

Bold fighter on Zelgius/BK with a QR seal/steady breath. They will be insanely strong.

Put Bold Fighter on armor units people usually bait for defensive arena. Last week I had two defends, then I put Bold Fighter on Robin and Hector and now I am drinking salty dragon tears as my morning beverage every day for the week ?.

Like everyone else said, bold fighter is a great skill, and if you feel like another unit you have (Robin, Hector, ect) just has better stats, they would benefit from it greatly. However, if you want to keep her, she isn't terrible on her own, and your particular IVs, while sub-optimal, don't kill her entirely. She still has great def and res, a nice hp, and then you would only have to give her atk or spd a little boost, maybe slaying axe and a nice special or even brave axe if you felt like Quad Lissa. I'm not saying that this would be meta-breaking, but I felt that there should at least be consideration of something other than sacrificing her, if you so wished.