(Mortigan Goth: Immortalis#2 (fb) - BTS) - Having observed this in silence, Jacqueline's uncle John (secretly the vampiric Baron Blood) asked what Jacqueline would tell her. Jacqueline replied, "That he's been called up...I can hardly tell her the truth." 

(Mortigan Goth: Immortalis#2 (fb)) - When John approached Katherine in her bedchambers, Katherine assumed it was Jacqueline and told "her" to go away. John clarified that it was him and he offered that he could tell her how to be with Mortigan. 

    Intrigued, Katherine closed the curtains at John's request (due to his sensitive skin) and asked if Mortigan had left a message with him. John told her that Mortigan left because he could never love her as she was, and that to be with him, she must pass through death to be immortal like him. 

    Though Katherine didn't understand what John was talking about, she soon was mesmerized by his gaze, and after he removed his oversized, brachygnathia (overbite)-mimicking dentures to reveal his vampiric fangs, she bared her flesh for him.

(Mortigan Goth: Immortalis#3 (fb) - BTS) - Baron Blood fatally drained Katherine's blood.

(Mortigan Goth: Immortalis#3 (fb) - BTS) - Upon learning of Katherine's death, Mortigan Goth returned to Falsworth manor.

(Mortigan Goth: Immortalis#3 (fb) - BTS) - Katherine revived as a vampire.

(Mortigan Goth: Immortalis#3 (fb) - BTS) - Katherine fed on people without killing them.

(Mortigan Goth: Immortalis#3 (fb) - BTS) - Katherine took up residence in a coffin in a mausoleum (presumably the Falsworth mausoleum), perhaps where she had been buried/interred after her death.

(Mortigan Goth: Immortalis#3 (fb) - BTS) - Katherine fed on someone before seeking out Mortigan.

(Mortigan Goth: Immortalis#3 (fb)) - Katherine entered Mortigan's room. Although still attracted to her, Mortigan told her he didn't love her, intending to spare her the pain of loving an immortal. She then revealed she had become a vampire so she could be with him, although she refused to divulge who had vampirized her, telling Mortigan that that vampire would hurt her. 

    Assuring Mortigan they could be together always and noting how lonely he must have been, Katherine drew him in for a kiss. Feeling her cold, dead lips, however, Mortigan pulled away, refusing to do this, and noting that she had already fed that evening. Although she assured Mortigan that she knew how to feed without killing anyone, he pulled out a cross and told her to get away. When she told him to take it away and asked why she was doing this, insisting he loved her, he touched the cross to her shoulder, burning her.

    Screaming in pain, Katherine ignored his apologies, told him she hated him, turned into a bat, and flew away, smashing through a window in the process.

(Mortigan Goth: Immortalis#3 (fb) - BTS) - With part of him still loving Katherine, Mortigan chose to confront Katherine at nighttime, rather than during daylight when she would asleep. He wanted her to know he didn't hate her, and he felt that beheading her would be an act of love (hmmmm....).

(Mortigan Goth: Immortalis#3 (fb)) - Katherine waited outside her coffin, surprising the axe-wielding Mortigan when he opened it and found it empty. Acknowledging that he had come to kill her, she told him that he shouldn't be so mean to him as it was her fault she was like this. 

     He apologized, telling her he didn't expect this to happen, and while she admitted she knew that, she lamented her lost youth and career, mockingly noting a nearby corpse to be her leading man and that her costume was stolen from the dead. 

     Noting that it wasn't much of a life but the only life she had, and that she couldn't even cry anymore, Katherine led Mortigan to embrace her and tell her he would help her all he could, although he wasn't sure how. Announcing that he would be a vampire, too, Katherine suddenly bit Mortigan on the neck and drank his blood.

(Mortigan Goth: Immortalis#3 (fb) - BTS) - Mortigan lay delirious for nearly 4 days, while Katherine found that Mortigan's blood had turned her human again. She stayed with Mortigan to make sure he was OK.

(Mortigan Goth: Immortalis#3 (fb)) - When Mortigan revived, Katherine cried tears of joy, noting her cure. However, acknowledging that he didn't love her, she decided that since she didn't know how long she would live or if the vampirism would return, she would live each day as her last. 

(Mortigan Goth: Immortalis#3 (fb) - BTS) - Katherine was working as a drama teacher at Saint Johns Boarding School, where the children loved her, when she reverted to vampirism.

(Mortigan Goth: Immortalis#3 (fb) - BTS) - Katherine vampirized a dozen or so students, and she maintained residence at Saint Johns with them.

(Mortigan Goth: Immortalis#2 (fb) - BTS) - Jacqueline and Dr. Strange summoned Mortigan to Falsworth manor, hoping he could help Katherine again, as well as to help Strange's vampiric brother, Victor.

(Mortigan Goth: Immortalis#3 (fb) - BTS) - Mortigan refused to provide a cure for Katherine, because it was only a temporary fix, and if he were destroyed (as someone (actually Mortigan's own lost soul, although he didn't know it) was killing "immortals" like him), no one could help her when she again reverted.

    At Mortigan's suggestion,  Jacqueline sought out Katherine's resting place. However, Katherine hypnotized Jacqueline, who then told her of Mortigan's refusal to help her. Wishing to regain another 50 years of life, Katherine arranged for Jacqueline to lead Mortigan into a trap and force his compliance.

(Mortigan Goth: Immortalis#3) - When Mortigan arrived with Jacqueline, Dr. Strange, and Mortigan's friend Tony the ghost, Katherine confronted him alongside the vampirized children, asking if Strange planned to kill all of them, too. Revealing that she had hypnotized Jacqueline and then holding a sword to Jacqueline's neck, Katherine made her demands. 

    Mortigan swung his axe at Katherine, causing her to release Jacqueline and turn into mist to avoid it, but the vampire youths overwhelmed and restrained both Mortigan and Strange. 

    When Katherine announced she would have Mortigan's blood, the youths insisted they would have it first, and they began to feed on him. She initially insisted they leave Mortigan for her, but after they refused, she decided that as the android Human Torch's blood had rejuvenated Jacqueline, it would do the same for her. Instead the blood burned her, consuming her from within, and she collapsed as a flaming skeleton. 

    Taking advantage of the distraction of Katherine's plight, Strange voiced a spell that immobilized the youths. After noting that even if they had consumed enough of Mortigan's blood to cure them, since Mortigan might not be around when they reverted, Strange decapitated the vampire youths with Mortigan's axe. 

(Mortigan Goth: Immortalis#3 - BTS) - Unable to directly participate in decapitating the vampire children, Jacqueline gathered firewood while Strange and Mortigan did the dirty work. 

    Strange and Mortigan then burned Katherine and the youth's heads and bodies in separate fires; the unnatural flames gave off no heat, but eventually only ashes were left.

As far as I could tell, none of the students were identified in the story.

(Mortigan Goth: Immortalis#3 (fb) - BTS) - Katherine was working as a drama teacher at Saint Johns Boarding School, where the children loved her, when she reverted to vampirism.

(Mortigan Goth: Immortalis#3 (fb) - BTS) - Katherine vampirized a dozen or so students, and she maintained residence at Saint Johns with them.

(Mortigan Goth: Immortalis#3 (fb) - BTS) - Jacqueline sought out Katherine's resting place. However, Katherine hypnotized Jacqueline, who then told her of Mortigan's refusal to help her. Wishing to regain another 50 years of life, Katherine arranged for Jacqueline to lead Mortigan into a trap and force his compliance.

(Mortigan Goth: Immortalis#3) - When Mortigan arrived with Jacqueline, Dr. Strange, and Mortigan's friend Tony the ghost, Katherine confronted him alongside the vampirized children, asking if Strange planned to kill all of them, too. 

    Although Mortigan and Strange attacked, the vampire youths overwhelmed and restrained both Mortigan and Strange. When Katherine announced she would have Mortigan's blood, the youths insisted they would have it first, and they began to feed on him. She initially insisted they leave Mortigan for her, but after they refused, she decided that as the android Human Torch's blood had rejuvenated Jacqueline, it would do the same for her. Instead the blood burned her, and she collapsed as a flaming skeleton. 

    Taking advantage of the distraction of Katherine's plight, Strange voiced a spell that immobilized the youths. After noting that even if they had consumed enough of Mortigan's blood to cure them, since Mortigan might not be around when they reverted, Strange decapitated the vampire youths with Mortigan's axe. 

(Mortigan Goth: Immortalis#3 - BTS) - Unwilling to directly participate in decapitating the vampire children, Jacqueline gathered firewood while Strange and Mortigan did the dirty work. 

    Strange and Mortigan then burned Katherine and the youth's heads and bodies in separate fires; the unnatural flames gave off no heat, but eventually only ashes were left.