So I'm back in Skyrim with Lissa
and it's so fun. A spell from the future plucked her from her time in TES4 and she woke up in Skyrim 200 years I to the future! She ended up at the border and was picked up by Empire soldiers and taken to Helgen.
She's already progresses through the MQ. Turns out she was plucked out of her time as she is the last dragonborn and as she would have no heir, who everver brought her to the future knew she was needed. She came to this conclusion also.
After defeating alduin she expected to return to her time... but alas she remained in Skyrim.
After travelling and doing the odd do-gooder quest, she heard about the Dawnguard returning. She knew they were vampire hunters... and she loathes vampires (her father was killed by one).
She is now progressing through that storyline and almost finished.
I think after this, depending if it gets activated, she might do the Dragon born questline.