The quest's actually pretty good. As you go through the ruin you see ghosts of the inhabitants preparing for their last battle, always a nice touch. Plus, you get Starfang, which quickly became one of my favourite swords in video game history.
Besides, if you're in the Glorious PC Gaming Master Race and determined not to get it, there are plenty of mods that make the NPC go away.
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"I'm Commander Shepard, and you're standing in the biggest library in Citadel Space. Look me up."