Nightwhisker

Nightwhisker is from the DeadClans Series.

History
DeadClans: Series 1 Book 1

At the beggining of the story, it is noted that he is a newly made warrior from a litter of one.

Trivia
Nightwhisker was actually told to help Deadcat make her clan when she was made a warrior. The only reason why he gets mad at Deadcat after he sees her with Lionwhisker is because he is in love with her too.