Thor: Not only is Thor a fellow Avenger of Sersi's, he has also aided the Eternals individually more than once. When Thor first ventured to Sersi's apartment in Manhattan, Sersi chose to let Thor carry her rather than fly beside him, in one of her more memorable moments of flirtatiousness. Thor and Sersi served as Avengers together for some time.

Captain America: Sersi first met Captain America when she was a young child and he had travelled back in time. Even then, she was attracted to him, and presented him with a posy of faded flowers that she cause to bloom with vitality once more. When the Captain was in need of someone with Sersi's powers, she was more than willing to help him, at a price! (Nothing more than a dinner date as it turns out). Cap must have enjoyed the dinner more than he let on, for soon after he invited Sersi to join the Avengers, an invitation that she readily accepted, due to her attraction to Cap as much as her desire to become a 'hero'. Sersi had an uncanny ability to cause Cap to blush underneath his mask with her flirty nature, and some of the best moments of her best moments as an Avenger are when she is flirting with the more reserved Cap.

The Avengers: Although she joined the Avengers on a whim, Sersi proved to be a staunch ally to them, and served with them for a lengthy amount of time. Things began to turn sour though, during Operation Galactic Storm, when Sersi joined in Iron Man's team who thought the Supreme Intelligence should be destroyed for it's involvement in the genocide of the Kree. This caused tension between Sersi and some of her fellow Avengers, especially Captain America. These tensions were heightened in the months after Galactic Storm, when Sersi fell victim to the subtle manipulations of Proctor, a man who had been spurned by a "Sersi" from an alternate reality. During this period, Sersi became snappy and viscous towards her teammates. This culminated on Polemacus, where Sersi slew the high priest Anskar after he cowardly murdered the girl Astra. Proctor's manipulations eventually caused Sersi to turn on both the Avengers and Eternals, who now thought her mad. With the help of the Watcher Ute, Sersi was able to break free from Proctor'spower, and end Proctor's influence over her. It remains to be seen, however, if all of Sersi's actions during this time, including her decision to join Iron Man's team during Galactic Storm, were due to Proctor's manipulation. Based on her previous appearances, I have to say that, in part at least, they were. Sersi recently aided the Avengers again in their recent encounter with Morgan Le Fey. Hopefully, Sersi will stand beside the Avengers again some time in the future.

Dr Samuel Holden: Dr Holden is a Professor of Anthropology who was invited to meet the Eternals by Margo Damien. Sersi was taken with the quietly spoken Doctor, and he soon began appearing by her side at her regular parties. Dr Holden aided Sersi and the Eternals more than once. Many of the great scenes in Kirby's Eternals are between Sersi and the Sam, and it is a shame that some later writers have ignored this. When Sersi joined the Avengers, there was no mention of Sam, and as she soon began a relationship with the Black Knight, it must be assumed that her relationship with Sam had ended. Hopefully the two remain friends, and Sam will show up at Sersi's side again one day soon.

The Black Knight: Some time after Sersi joined the Avengers, former member Dane Whitman, the Black Knight, re-joined as well. Sersi was attracted to Dane, and the two began a relationship together. Sersi eventually made Dane her Gann Josin, which roughly translates as 'Soul Mate'. Although he was mutually attracted to Sersi, the Black Knight was also torn by his love for the newest Avenger Crystal. After the Avengers final clash with Proctor, however, the Black Knight chose to join Sersi in her dimensional exile, ending up in the Ultraverse. After a few months in the Ultraverse together, the Black Knight and Sersi returned to our Earth, via a time trip to ancient Egypt, where they battled the man who would become Exodus. Once they returned to our time, the two decided to remain friends, but go their separate ways. The Black Knight and Sersi remain close however, and may be seen together again some time in the future.