The Radium Sisters

Molly and Miranda Maggia, often referred to as The Radium Sisters, are a pair of radioactive sisters who glow green from the combination and amount of Radium and general radioactivity they've come into contact with over the years, along with the rest of their settlement. They are possible companions and were introduced in the first Quest, "The Punishment Due". Discovered in a jail cell by Nine, Molly and Miranda assisted in The Convicts' escape from prison and were subsequently invited to join the group in their travels.

Combat
As they've grown up together and haven't spent a day apart since they were small children, they work together or not at all. As such, they have the Pack Alpha perk. This means for every one of their allies that has already damaged a target since the end of their last turn, their own attacks do an additional point of damage to that target. In combat they favor radioactive weapons such as Radium Rifles.