Religion: Christian (denomination unknown)
Name: Cindy Lou
Other Names: "Cindy Lou Hugh"
First Appearance: Thor (vol. 1) #444 (Feb. 1992): "How The Groonk Stole Christmas!"
Number of Appearances: 1
Ally: The Groonk
Note: analog to Cindy Lou Who in Dr. Seus Christmas story
Cindy Lou (whose last name was never revealed) was a transparent analog to Cindy Lou Who, a major supporting character in the classic Dr. Seus book How the Grinch Stole Christmas.
In Thor #444, Cindy Lou was a homeless girl who lived beneath the streets of New York City with her dog Max (who she dressed in a Santa costume for Christmas). Cindy Lou befriended the Groon, an apparent Morlock who stole Christmas presents from surface dwellers to give to homeless people living in the sewers.
Suggested links for further research about this character and the character's religious affiliation: