Keiko was a decent love interest for Yusuke.
That scene where she kisses him back to life was very touching.
And her almost getting killed by semi zombies was very thrilling.
I never quite understood why she liked Yusuke so much.
While he wasn’t unfaithful, he was a pretty crappy boyfriend. She kind of gets the idea when he wants to spend years in demon world.
And she stupidly waited for him. Even the most intelligent people make the poorest choices.