During the Age of Apocalypse, Blink was with the X-Men, but was affiliated with X-Factor. Her sacrifice then led to the formation of Generation X in the regular timeline (Not the Age of Apocalypse timeline).

Blink had the potential to form gateways through dimensions, an ability exploited by the X-Men during the Age of Apocalypse series. In the present X-Men timeline, she is untrained and cannot really do much more than fracture reality. There is a mentor/apprentice relationship between Blink and the Age of Apocalypse's somewhat-less-homicidal-than-usual Victor Creed is quite interesting. That being said, however; there is nothing very unusual about her, except for the fact that she has a large following that has caused her to be reborn in an as yet undetermined future issue of an X-Man comic.

Clarice Ferguson was rescued as a little girl by Sabretooth from the site of a culling. Trained for years by Sabretooth to defend herself, Clarice became one of the X-Men despite her age. After the supposed "death" of Sabretooth at Holocaust's hands, Blink singlehandedly engages Holocaust in battle and nearly defeats him, crippling Apocalypse's Infinite processing plant in the process. It is her teleportational power that allow the X-Men into Apocalypse's Base of Operations and leads to the final battle between them and Apocalypse's army. (Yea, I know that technically Blink wasn't one of the most important characters, but it just seemed like blasphemy not to include her.)