Nightcrawler (Kurt Wagner) is a blue-skinned, teleporting X-Man with a prehensile tail who was abandoned at birth for his demonic appearance and found faith and purpose among the mutants who became his family. Created by Dave Cockrum in 1975, Kurt is beloved for his swashbuckling warmth — he is the X-Men's soul, a devout Catholic who sees no contradiction between his faith and his monstrous form. His ability to teleport by passing through a brimstone dimension makes him one of the team's most versatile fighters.

Reference:

Nightcrawler on Wikipedia

https://en.wikipedia.org/wiki/Special:Search?search=%2344%20Nightcrawler