Delphine

Quests

 * The Horn of Jurgen Windcaller
 * A Blade in the Dark
 * Diplomatic Immunity
 * A Cornered Rat
 * Alduin's Wall
 * Rebuilding the Blades
 * Season Unending
 * Paarthurnax

Curiosity

 * At the end of A Blade in the Dark Delphine tells you to meet her at Riverwood (as part of the follow-up quest Diplomatic Immunity). Should you instead decide to follow Delphine back all the way, it turns out she will return to Whiterun instead, where she has a room at the The Bannered Mare. And she will also tell you clearly to not meet her here, but in Riverwood.

Delphine