Project Umbrella RE:Digestさんのイラストまとめ

In the BIO4 Castle Ver. written by FLAGSHIP & Yasuhisa Kawamura, the "fog" enemy was a viral weapon made by Wesker's organization. It infected Leon in a battle between HCF & Leon's anti-Umbrella special forces. Due to tech limitations, it was remade as Uroboros in BIO5.
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Tick is an insect-human hybrid subspecies of the Hunter made by the Arklay Lab. It had a brown exoskeleton, purple muscles & inhabited the courtyard basement, using the darkness to hunt with sickle-like arms. It's exclusive to BIO1's Sega Saturn version.
Pics: @USS_CMD
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@KiryuAttorney @ClaireChaotic They basically split Spencer into two characters-- Sparda & Mundus. The old design of Spencer is also Mundus' human form, according to Kamiya. Originally, prior to Tony Redgrave, it was going to be Leon S. Kennedy, since it was to be "the" sequel to BIO2 (named BIO2.5 once).

"-Leon works as part of a US secret military agency because Sherry was taken as a kind of hostage. -
agents of Albert Wesker are also in the department monitoring Sherry, putting her in a doubly-dangerous position."

- INSIDE OF BIOHAZARD THE DARKSIDE CHRONICLES (pg188)

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Web Spinner was a spider BOW made in the Arklay Lab's early stages of t-Virus research, since gene editing was easier on creatures with ancient body structures. The t-Virus α strain was discovered in these specimens & they were disposed of, except some kept for data use. #REBHFun

In BIO1.5, Leon was a son of Italian-American immigrants with a more average personality & less of a strong sense of justice. Initial character settings, correlation chart & scenario draft were written by Isao Oishi, who drew this art & also conceived the Zapping System. #REBHFun

Gulp Worm is a prototype earthworm-based BOW genetically enhanced with the t-Virus, inspired by the Grave Digger. It was used on Rockfort Island for data collection, anti-BOW training & mock battle combat tests. Its huge mouth & digestive organs can devour humans whole. #REBHFun

A G-Adult Organism results if a host implanted with a G-Creature embryo has no genetic relation. The G cells cause an intense rejection, the embryo becomes an individual, then eats the host within before bursting out. Its inferior clones lack vitality & can't reproduce. #REBHFun

Jabberwock S3 is a prototype BOW made with t-Veronica by HCF. Its sickle-like arms are strong as steel & it can follow orders with intellect to fulfill tasks under many conditions. The embedded bolt in its head contains an ampoule & memory device to suppress mutation. #REBHFun

Grave Digger was an irregular mutant exposed to the t-Virus in soil near the P-12A disposal plant where William Birkin effected a biohazard. It lost its original form via repeated molting & fed on buried corpses & humans above ground with a concrete-crunching mouth. #REBHFun