Hyzenthlay was an Efrafan doe and one of the representative leaders of a group who unsuccessfully tried to convince General Woundwort to allow herself and some other does to leave the warren due to overcrowding. When Bigwig infiltrated Efrafa, secretly planning to help some does escape, he befriends Hyzenthlay. She is described as sensible and strong and able to think on her own account, just what Bigwig needs in a friend during this dangerous mission. Led by Bigwig, she is one of the rabbits who escapes along with Blackavar and other Efrafan does to live in the Watership Down Warren. After the escape, the Battle of Watership Down took place soon after they returned to Watership Down Warren. The Watership rabbits won the Battle against Efrafa.
In the film, it is said by Vervain, one the Efrafan captains that she is a disturber. Also, it's mentioned that the council ordered to be strictly supervised by one of the captains.
Main article: Primrose
In the TV series, it seems that Hyzenthlay was replaced by another character called Primrose as Hazel's mate (or was renamed Primrose, thus giving another appearence). Her sixth sense is absent. She and Hazel also have kittens.
She is described by Bigwig as being smart and sensible, but also strong, tough and able to think on her own account.
- Her name means "fur shining like dew" in the Lapine language.
- She appears to have some form of sixth sense, having visions of the future while living in Efrafa.