The reincarnations of monsters tend to follow their past life's path, including but not limited to:

Octavia Merimange, Reincarnation of Arachne

Octavia fights using taekwando, mainly utilizing her feet to inflict blows on her opponents as a result. She can manifest four extra, spider-like energy legs to inflict more physical damage on her opponents. Other abilities include wall crawling, web generation, radar sense, superhuman strength, speed, agility, reflexes, limb regrowth, night vision, invisibility, enhanced stealth, seismic sense, and control over arachnids that she can use as spies. She loves taunting and luring in her prey before decimating them, often stringing up their unconscious or lifeless bodies in order to spread fear amongst the population and to taunt other, more powerful heroes.

Daphne Hisslop, Reincarnation of Jormungand
Daphne utilizes a combination of Fanged Snake and Poison Hand kung fu. She has immense strength and stamina, can generate both lethal fire and venom, and project powerful illusions. She can also cause earthquakes by striking the Earth to catch opponents off-guard. Similarly to Octavia, she'll often lure her prey in, but mainly through seduction, and once they drop their guard, she is quick to kill or render them unconscious depending on her use for them.

These two love working together and are often seen colliding against heroes.

There are also

Boa Casanova, The Reincarnation of Leviathan
Boa has enhanced senses, flight, possession (only over regular humans, not reincarnations), temporary power negation, a healing factor, shapeshifting, voice mimicry, superhuman strength, speed, stamina, agility, stealth, and venomous blood that she often keeps in syringes she keeps hidden on her person to use whenever she's in a tight spot or in vials to lace drinks with it. Her blood causes an extremely slow and painful death for those its used on, and while the effects can be slowed down, there is no real cure unless one is blessed by a reincarnation that is a god of healing/health... though Boa often targets these individuals first so she can eliminate those capable of negating her blood attacks. She has a more of a refined air to her, as she comes from a family of immense wealth and resources. She rarely loses her cool and is always seen with a smirk on her lips. She often works in the shadows, so heroes suspect her but are never able to prove that she is the villain they believe her to be. Octavia and Daphne are essentially her henchmen from time to time.

Homura Kagutsuchi, The Reincarnation of Hephaestus
(AU OC)
A serial arsonist that constantly sets fires and tries to create the most amount of damage as quickly as possible. She occasionally crafts weapons for fellow villainous reincarnations so long as the designs intigue/interest her. She also builds up her own minions/automatons that she sends to distract/mislead heroes, some of which she has used the souls of reincarnations she has killed to fuel the automatons and make them even more powerful. The souls she has collected are those of Hestia, Dionysus, Nepthys, Sif, Nabu, and Geb. She has a favorite automaton, her prized dragon Festus, which can double both as a independent automaton and as a set of armor for her to wear if she must fight herself.

All four of these individuals are weak against magical attacks in varying degrees, which is why they try to defeat heroes quickly so that they're less likely to be hit by magical attacks.

Scenarios will be posted soon, these were just to introduce some villainous characters. The big bosses will be coming soon/introduced as well.