Pretty obvious format here: I give you the first words of the character, you have to name him or her. Note: I am excluding cover and splash page statements here:
1. "I've found it! The legendary city of Caramanga!"
2. "Well, here goes experiment #145!"
3. "Lead never hurt a wooden leg!"
4. "It is the first time I have found it necessary to give the signal!"
5. "Huh? What? Go 'way! I wanna sleep! Lemme be!"
(Update: Corrected the quote on #5 per commenter Boosterrific)