He joined Scourge in the battle of BloodClan in Book 6, The Darkest Hour. He betrayed the warrior code and tried to kill Firestar. So when Graytail killed him, he went to the Dark Forest where Tigerstar and Hawkfrost are.
Place of No Stars (Dark Forest)
Tigerstar Brokenstar Clawface (probably) Darkstripe Hawkfrost Snowtuft Shredtail
1. Ashfur (ThunderClan) 2. Hollyleaf 3. Thistleclaw 4. Hawkheart 5. Tigerstar 6. Brokenstar 7. Clawface 8. Darkstripe
First it was Redtail then it was Darkstripe when Redtail died.
Yes, graystripe and Darkstripe fight when Graystripe sees Darkstripe feeding Sorrelkit death berries. It's in book 6
Graystripe killed Darkstripe to protect Firestar, as Darkstripe was a traitor working for Tigerstar and attempting to harm Firestar. Graystripe recognized the threat Darkstripe posed and took action to ensure the safety of his leader and Clan.
He doesn't show any respect because Darkstripe is loyal to Tigerstar and Tigerstar hates Graystripe, Firestar, etc. Also, Darkstripe is pretty much rude to everyone.
Led by, Tigerstar and Brokenstar Tigerstar - Deceased, Verified Place of No Stars member Brokenstar - Deceased, Verified Place of No Stars member Blackstar - Living, as of Fading Echoes Russetfur - Deceased, Suspected StarClan member Boulder - Deceased, Suspected StarClan member Clawface - Deceased, Suspected Place of No Stars member Jaggedtooth - Status Unknown, most likely deceased
Because Sorrelkit followed Darkstripe to meeting Blackfoot about killing Brackenfur.
Darkstripe is a large, sleek, dark gray tabby with black stripes and amber eyes.
It does not say.
Darkstripe's mentor was Tigerstar. Tigerstar was a cruel and ambitious leader of ShadowClan who trained Darkstripe in his early days as an apprentice.