Conversation so far:
What was the first publication date of Kitty Pryde?
The character of Kitty Pryde was first published by Marvel Studios in January 1980.
Who introduced the character Kitty Pryde?
Artist John Byrne introduced the character Kitty Pryde into the X-Men universe.
What is the story behind the name Kitty Pryde?
Uncanny X-Men artist John Byrne named Kitty Pryde after a classmate he met in art school, Alberta College of Art and Design in Calgary in 1973.
Where did the Kitty Pryde come from?
Katherine Anne Kitty Pryde was born in Deerfield, Illinois, to Carmen and Theresa Pryde.
What were Kitty Pryde's powers going to be?
How was Kitty Pryde accepted into the Xmen issues by readers?
Kitty Pryde has been well received as a comic book character of the X-Men. Wizard magazine put her at number #13 in 200 Greatest Comic Characters of All Time.
How long did Kitty Pryde last in the Xmen series?
Kitty Pryde remained a part of the X-Men books until 2008 when she left again for roughly 2 years.
What else was interesting about Kitty Pryde's history besides who introduced her, name origin, place of birth, comic book reception, and time with the x-men ?
With the help of Dazzler and Kitty Pryde, those X-Men rescued their teammates from the Hellfire Club.

Question: Why did she leave for 2 years?
Self-contained rewrite: Why did Kitty Pryde leave for 2 years?