Board Thread:General Discussion/@comment-165.138.41.121-20161102184709/@comment-1600847-20161102185758

In all likelyhood Karliah's father is Drayven Indoril, but if she were Tiber Septim's granddaughter then she could, technically, claim the Ruby Throne. Problems:

a) She'd have to prove it (nigh impossible since only lighting the Dragonfires could do that but they're gone now)

b) The Mede Emperors who would likely not give up the Throne without a fight.