More of Rosie explored in "Hello Rosie!", where Rosie presents herself as gracious and charming when interacting and socializing with others. Among the residents of the Cannibal Town, Rosie is gracious and kind to the cannibals who who visit her Emporium, offering advice or her personal assistance in solving them. Later, after warmly greeting Alastor, Rosie politely greeted Charlie and wasted no time in being a gracious host, giving her a place to sit and rest and offering to give her food before agreeing to hear her problems, showing Rosie's friendliness and graciousness.
Rosie is especially kind and loving to those she considers her friends, such as with Alastor, whom after meeting up with him again after his "sabbatical", she eagerly greeted him as a friend. After meeting Charlie and taking a liking towards her, Rosie kindly offered to hear her out her dilemna and repeatedly gave Charlie suggestions on how to overcome them. During this conversation, Rosie was very empathetic and understanding to not only to Charlie, but also to Vaggie, whom she correctly deduced was ashamed of her past and didn't want to reveal it to Charlie in fear of being rejected by her. Due to her past experiences, Rosie believes that words are cheap and only action is what ultimately shows the truth, particularly when Rosie remarked that Vaggie trying to make up for her past actions by helping Charlie was telling of Vaggie's love for her.
However, despite her general kindness, Rosie is shown to have a dark side as an Overlord. Following the latest Extermination, Rosie isn't particularly sensitive to the death of her associate, Franklin, as she is seen crossing off his name on their sign, seemingly without a care. Rosie is also highly intelligent and cunning, as shown where she had intimate knowledge on the territorial disputes in sections of Pentagram City between the various demon factions of the city. Rosie herself can also be quite commanding and intimidating towards the cannibals when she wants to be and can lead them efficiently as their leader, being fully aware of the mentality of the cannibals and offered Charlie sound advice on how to properly appeal to them to get them to help her. She likewise collaborates with Alastor to ensure their mutual success as Overlords, as seen when she offered Alastor information regarding a slot of territory he could easily take over with the right deal. Later, after Charlie successfully convinced the Cannibals of Cannibal Town to help her, Rosie took note of Charlie's charisma and the immense power she inherited from her father, agreeing with Alastor that taking her side would ultimately be beneficial for them both in the future.
Rosie also indulges in the morbid environment of Cannibal Town, being nonchalant and even friendly about its cannibalistic tendencies along with her Emporium selling numerous cannibalistic treats. Rosie even casually offered to feed Charlie a demon leg and some pinky fingers as hospitality to her when she arrived at her Emporium.
