Lou (Harley Quinn's pet hyena)
Lou (Harley Quinn's pet hyena) appears in 7 issues in grailworth's catalog, and was first published in 2001. First appearance: Harley Quinn #4 (2000), cover dated 2001.
First appearance
Every appearance we value
Batman (2016) 1 issue
Batman: Li'l Gotham (2013) 4 issues
Harley Quinn (2000) 1 issue
Character appearances from the Grand Comics Database, CC BY-SA 4.0.