Part 5: Beginning of the Fight is an issue of the Resident Evil: The Marhawa Desire manga series, known as BIOHAZARD marhawa desire in Japan. There, it is referred to as "Episode 5" (第5話 Dai 5-wa ). It was first published in Issue #17 of the Weekly Shōnen Champion Extra's 2012 series, but was later on re-published in the first tankōbon volume on June 8.
Mother Gracia has been attacked in her office by a zombified student, though uses a handgun to blow his head off. The gunshot gets the attention of much of the school, though she has not yet thought of a way of covering it up. She instead calms down, looks out her window and tells the staff to dispose of the boy's body, who is now the third Zombie to appear in the school, and still with no explanation.
Ricky Tozawa and Dr. Doug Wright reach their car, only to find it wrecked and its engine on fire, which Dr. Wright suspects was on the orders of Mother Gracia to prevent him calling the BSAA. As the jungle is too dense to roam through for a phone signal, the only solution is to return to the school and solve the case themselves. Heading to bed, Tozawa asks his uncle if Mother Gracia was as delusional when they were going out; he answers "no".
Elsewhere, Mother Gracia takes off her bloodstained clothes and steps into a shower. She thinks back to when her father died; the former headmaster of the school, he gave her control of the school in his will. In the flashback, the young Gracia is taken aback by the solicitor's remarks. She was from a large household that spread around the world, but never thought her father thought highly of her in any regards, certainly not enough to make her his successor. As part of her new job, she is given a nun's habit and the title of Mother. She nonetheless thinks highly of the school as a sanctuary, and promises to herself to preserve her father's legacy by keeping it a sanctuary.
Back in the present, Tozawa and Dr. Wright agree they will not follow Mother Gracia's way of thinking, and will do what they can to keep the recent events from being covered up. From here on out, she is an enemy.