Henriette "One Eye" Cooper was a female member of the Cooper Clan and a pirate from 17th century colonial Caribbean. She sailed the seas and stole from other pirates. Originally wielding a dagger with the Cooper crook serving as the handle, she presumably lost a paw and replaced it with a prosthetic hook shaped like the trademark Cooper crook. She was immortalized in the Cooper Vault, along with her loot and her hook on display. She protected her loot with an obstacle containing overturned boats with flaming skulls on a pulley system.
When he viewed her portrait in the Cooper Vault, Sly commented he "takes after her," referencing to his pirating adventures in Blood Bath Bay.
During the mission Copy Cats, it is revealed that in the year 1616, Henriette Cooper steals Sinbad's Legendary Goblet filled to the brim with treasure coins. Sly was tempted to steal the coins himself when he was in the area in 1001 A.D., but Bentley reminded him that altering the timeline in any way could result in catastrophic changes in the future, including preventing Sly from becoming a thief at all. Based on the year that she completed this legendary feat, it is safe to presume that she is Rioichi Cooper's daughter, as his chapter in Thieves In Time is in the year 1603.
Henriette "One Eye" Cooper share some similarities to another female pirate Risky Boots from the Shantae Series as both are females, both are pirates, both sail across the seven seas, both love to steal things, both have a ship although Risky's ship is more rather robotic made out of wood and metal with legs, eyes, and a mouth full of teeth that can move while Henriette "One Eye" Cooper's ship is just a regular pirate ship, both have Pirate Gear, and both are Captin of their Crew.
Henriette is one of the few known female Coopers, the others being Karin Coopergiwa, Sally Cooper, and Suzanne Cooper (and possibly Kelle McCooper).
It can be assumed that her signature move was the crawl move, since that was her challenge in the Cooper Vault.
Bentley pronounces her name as "Henrietta."
Given that the Cooper Gang visits Rioichi Cooper in the year 1603, and that Henriette stole Sinbad's Goblet in the year 1616 (a difference of 13 years), it's possible that she is Rioichi's daughter, sister or wife (it can't be told which is correct, since we don't know exactly how old Henriette was when she stole the Goblet). It is more likely that Henriette is his daughter or sister than wife, because Rioichi's wife would not have been of Cooper lineage. However, considering that families branch off when there are multiple siblings who marry, Rioichi may just have been a relative who was alive at the same time Henriette was, and simply gave her the Thievius Raccoonus upon her visit to Japan.