*In Transformers: Prime, Airachnid is a Decepticon who is cruel, homicidal, and a traitor:

Personality Airachnid is a collector who travels the galaxy to mount the heads of endangered alien species on her wall. She is also a sadist who is only concerned with herself, which causes many Decepticons to distrust her.

History Airachnid crash lands on Earth after the war on Cybertron and works as an unaligned agent before being brought to Megatron. She helps the Decepticons until she is nearly killed in an assassination attempt, which leads her to take revenge on Megatron. She is later freed by Silas, who infects her and leaves her on a distant moon with her Insecticon army.

Encounter with Arcee In one episode, Jack and Arcee discover a crashed spaceship owned by Airachnid. Airachnid is still in the forest searching for a human to hunt, putting Jack in danger. Arcee has visions of her last encounter with Airachnid on Cybertron, where she violently executed her partner Tailgate. This encounter ignited a long-lasting rivalry between Arcee and Airachnid.*