Imzeel Coopercan, a half-dwarf, was the proprietor of the Mighty Manticore. One of the barmaids under his employ was a female human named Ginalee. Imzeel sought all the knowledge he could obtain from overhearing the patrons to his establishment.
The tavern's name came from the stuffed and mounted lion's head located over the bar that was imaginatively referred to as a manticore. However, most patrons referred to the head as the Mangy Manticore.
The Manticore catered to merchants and politicians, thanks to its location in the heart of the Castle Ward as well as its advantageous backdoor into the Jester's Court where more private business could be conducted.
In the days leading up to the Midsummer Faire in 1364 DR, Khelben "Blackstaff" Arunsun secret met with the Masked Minstrel at this tavern. However, his disguise was accidentally revealed by fellow wizards of the Waterdeep.