Dahlia Radim is a female Genii and is Ladon Radim's sister. She worked in close proximity to a Genii A-bombs, which was poorly shielded and as a result she suffered from radiation poisoning, which could not be effectively treated by Genii medicine. Luckily, she and a number of her people were later treated by Earth's far more superior medicines, which Ladon was grateful for. After being appointed as the new Genii leader after his Coup d'etat, Ladon seemed far less antagonistic towards the Atlantis expedition than Cowen was. (SGA: "Coup D'etat")

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