She is a pretty,dappled gray tabby she-cat with green eyes.
Mousefur, Brindleface, Brambleclaw, etc........
Redtail's mate in the warrior books is Brindleface. Sandstorm was their only kit.
In the Warriors series, Ashfur's parents are Whitestorm and Brindleface. Whitestorm is a white tom with a thick fur coat, while Brindleface is a tortoiseshell she-cat with brindle markings on her face.
Erin hunter said brindleface is sandstorm's mother, making her half sister ferncloud.
Erin Hunter herself has said that Brindleface is Sandstorm's mother
The mother is Brindleface, father is Whitestorm, and sister is Ferncloud.
a silver-grey tabby she-cat with bright blue eyes
Yes, Tigerstar killed Brindleface in the fifth book "A Dangerous Path". Tigerstar used Brindleface's dead body to lure the pack of dogs toward the ThunderClan camp, where they can destroy the camp and kill the Clan cats, especially Bluestar who was on her last life.
In "Warriors: A Dangerous Path," the cats that die are Stonefur, Runningwind, Whitestorm, Lionheart, and Brindleface. Stonefur is killed by Blackfoot during the 'Great Battle'. Runningwind, Whitestorm, and Lionheart die during the 'Great Battle', while Brindleface is killed by Tigerstar's dogs.
Her grandmother is Swiftbreeze, and her grandfather is Adderfang.
Brindleface, Runningwind, he made Graypool fall to her death, Redtail and he commanded Blackfoot and Darkstripe to kill Stonefur.
In the Warriors Series, Lightningtail's description happens to be unknown, so the world may never know.