Josie is dressed like a nun

Josie was close friends with fellow initiate Henry Winchester, Josie was in love with Henry, but could not pursue him

Josie subsequently lost all control of her body to Abaddon, who masqueraded as her in order to fool everyone who knew Josie and to keep the Men of Letters from suspecting that Josie had become possessed

Josie Sands was a Men of Letters initiate. She became possessed by the demon Abaddon before she could be inducted, and was forced to destroy the very organization she had been preparing to join

On the day of Josie's initiation, she was forced by Abaddon to go in and slaughter the Elders of the Men of Letters who were supposed to induct her. Abaddon then forced her to attack Henry, as Abaddon wanted the key to the bunker he had been entrusted, and brought Josie into the future, the year 2013, to keep pursuing him. Henry tried to appeal to his friend to resist the possession, but Abaddon stated that Josie was "indisposed"; if Josie was conscious to hear Henry's pleas, she was evidently unable to reclaim control from Abaddon