Peacekeeper Officer Aeryn Sun�s time on Moya could best be summed up as conflict. Conflict with her upbringing as a Peacekeeper, conflict over her feelings for Crichton, conflict over the best road to take now.

Sebacean by race, Aeryn was born and brought up to obey orders, in the belief that all other races were inferior. A good soldier and ace pilot, only once in her strict training was any emotion allowed to creep in, when her mother, Xhalax Sun crept into her dormitory by night to tell her that she had been born out of love.

Sucked onto Moya, Aeryn found her life ruined. By consorting with Crichton, an unknown alien, she became �irreversibly contaminated� by Peacekeeper standards, and was rejected by her former colleagues. Since then she�s had to re-examine her old beliefs and loyalties, becoming instead close to her fellow renegades on Moya. She is particularly close to Pilot, drawn by his non-judgemental attitude, and by the fact that she shares his DNA after a crazed scientist experimented on her.

Her relationship with John has been stormy. Right from the start there was something between them, no matter how much she tried to deny it. Their love affair has been on-off. Little things John did, like go mad, had much to do with the off-periods.

Then in season three it became both on and off at the same time, as she fell deeply in love with one of the two Crichtons created by mad scientist Kaarvok�s twinning of the astronaut. Right now it�s very much off: after she watched her lover die in her arms, how can she face his twin?

The other Crichton�s still waiting, but she may never go back to him - despite being pregnant with his clone�s baby.

Key episodes: Premiere, PK Tech Girl, DNA Mad Scientist, The Way We Weren't, Look at the Princess trilogy, Liars, Guns and Money trilogy, Die Me, Dichotomy, Different Destinations, Green-eyed Monster, Relativity, Infinite Possibilities parts 1 and 2, The Choice, Dog With Two Bones.

Read our actor profile of Claudia Black.