- Appendage Assimilation: The Queen Relics that they bear constantly corrode both their physical being and sanity, effectively turning them into new Queens once the assimilation is completed. Holding more than one Relic inside one's body greatly accelerates this process.
- Fisher King: Each Successor was given the ability to alter their Crypt, i.e. the place they'd spend the rest of their unlife hanging out in, to their particular tastes. This was explicitly so they could make it into a place that put them at ease, in order to help maintain their sanity as their Relic tried to break free of their bodies. As they began to lose themselves however, this ability had the opposite effect, spreading their unique corrupted influence to the land around them. A normal mountain range became a unnaturally frozen labyrinth, a once green city became a barren desert after winds spread salt over it, etc.
- Humanity Ensues: Zigzagged. Unlike in the case of Eva Roux, whose transformation could be undone since they were only recently turned into a Successor, the rest are permanently stuck inside their new bodies. Their sanity can be restored if the Protagonist purifies their Vestiges prior to defeating them. In the "Dwellers in the Dark" ending, the Successors' bodies are returned to normal, due to the fact that all the Relics were pulled out of their bodies, and thus ridding them of their transformed selves.
- Reduced to Dust: What every Successor ultimately becomes if the Protagonist cannot/does not save them, in addition to them dying. Despite all of them being rather large, the resulting ash pile is always tiny by comparison.
- Resurrective Immortality: Much like Revenants, the Successors can come back to life — albeit extremely faster than Revenants or any Lost can. The only way to actually kill them is to destroy the Relic inside their bodies, but the Relics are extraordinarily durable and can't be destroyed by conventional means.
- Superpowered Mook: Some of them are Lost, but they're exceedingly powerful because they've been grafted with pieces of Cruz's body. The ones that avoided becoming Lost have gained particular powers and abilities based on the Relic they bear.
- Soul Jar: Because Cruz was effectively immortal, even though she was killed during Operation Queenslayer by the Protagonist, her body had to be separated to prevent her from coming back. The Successors are Revenants possessed a high affinity for the Q.U.E.E.N, making them the perfect vessels for Cruz's pieces. Even after they lost control, the resulting Lost still keep the Relics contained.
- Theme Music Powerup: Upon reaching the second phase of their respective boss fight, their original Battle Theme Music goes away while Heir of the Shingai kicks in, signifying the Successor is now pulling out all the stops to kill you.
Successor of the Ribcage
The Successor that awaits in the Cathedral of the Sacred Blood. A giant creature with a wolf-like head and four arms and two legs, it stands before the protagonist and company as if to block the door to the cathedral.
- Angry Guard Dog: Guards the Cathedral of the Sacred Blood, and the door leading to the chamber below.
- Body Horror: Her humanoid hind legs are facing upwards, in the opposite direction of her torso.
- Boss Arena Idiocy: She would be almost unstoppable if her arena didn't have large pillars in it, giving the player cover from her barrages. She attempts to mitigate this in the second phase by casting attacks that go around the pillars, but they still offer good cover regardless.
- Elemental Powers: Can use multiple elemental Gifts such as fire, ice and thunder. In the second phase of the fight, she uses all of them at the same time.
- Glass Cannon: She uses a variety of powerful elemental Gifts to fight you, but has lower defense and health compared to most bosses. Good luck getting close enough to her to actually hit her in the first place though.
- Multi-Armed and Dangerous: Has four arms and uses them to cast powerful elemental Gifts to attack.
- Non-Human Head: Disturbingly, it has a wolf head with the body of a female human on her back.
- Undying Loyalty: Willingly become a Successor despite knowing the risk and effect of becoming one just to protect Karen from harm.
- Weaksauce Weakness: In defiance of all logic in a Souls-like game when confronted by a boss with superior firepower, the best way to safely take on the Successor of the Ribcage is to get as close to her as possible. Specifically, she is mostly immobile throughout most of the fight, making it so that the player could sneak up behind the boss and literally smack her in the lady parts over and over again until she dies. She also has very little in the way of defense, as both of the attacks that could hit a player shanking her behind have obvious telegraphs that could simply be dodged out of the way in an instant.
Successor of the Breath
The Successor that awaits in the Ridge of Frozen Souls. A large animated suit of armor whose helmet is adorned with large antlers that awaits the protagonist and company among the frozen wastes.
- Animated Armor: There doesn't appear to be anything visible underneath his bulky armor outside of his glowing eyes.
- Baleful Polymorph: Inverted; while he was initially too frenzied to comprehend his transformation into a Lost, Nicola is more than happy to remain a big and burly knight forever if you restore his memories. Talking to him after achieving the "Dweller In The Dark" ending will have the kid express disappointment that his body reverted back to his original, diminutive form.
- An Ice Person: He uses a lot of ice attacks, such as pulling giant icicles from the ground with his headbutt and creating several homing projectiles of ice that is suspiciously identical to Mia's Guard of Honor. Justified since his real identity is Nicola, the younger brother of Mia.
- Luckily, My Shield Will Protect Me: Wields a large, circular saw-edged shield that is genuinely functional and reduces all damage coming to his left side, but doesn't actively use it for blocking. He will just use it to bash your face in.
- Mighty Glacier: Has plenty of health and hits hard but is rather slow. He becomes much faster once he ditches his heavy shield and powers up though.
- Morphic Resonance: Nicola wore a backpack shaped like a rocket ship, which was incorporated into his Successor form as an functional jetpack.
- Ninja Pirate Zombie Robot: An armoured knight with four eyes, a sawblade shield, moose antlers and a jetpack. Justified as it's the creation of a little boy, who would find this sort of thing cool.
- Shed Armor, Gain Speed: He discards his shield and begins using his jetpack in the later portion of his fight.
- The One Guy: The only male of the Successors that are fought, until the player runs into the Skull King.
- Turn Red: Once his health is depleted enough, he will ditch his shield and power up, becoming much faster in attacking with the use of his jetpack.
- Use Your Head: One of his attacks is a quick headbutt. Him having one antler on his helmet gives the attack a bit more reach than it usually would have.
Successor of the Claw
The Successor who inherited Q.U.E.E.N.'s claws. It has deep red claws that shine like a crimson flame and two tails. Its head is fully masked, meaning that its facial expressions are unreadable, but the prey reflected in its eyes is undoubtedly invited to death.
- Dual Wielding: Uses a wakizashi and a katana. You get to use the katana itself once you defeated it, which is called "Blazing Claw".
- Expy: The boss fights a lot like the Dancer of the Boreal Valley from Dark Souls III; walking on all fours, having fire moves accompanied by a flaming sword which gets used more in a second phase, and ambiguously sexy parts. Similarly, both were the results of cruel experimentation, the former by Juzo Mido and the latter by Pontiff Sulyvahn
- Ms. Fanservice: Cat characteristics aside, she has a curvy physique, huge breasts and strikes sexy poses. Emily Su's human form is also quite the eye candy herself, wearing a near skin-tight top with large breasts.
- Nekomata: Its mask resembles a cat and it possess the distinctive two split tails.
- Playing with Fire: Wreathed in flames and uses a variety of fire based attacks.
- Ninja Pirate Zombie Robot: A giant gas-masked Cat Girl that also happens to shoot fireballs, be a super-agile predator, and also fights like a Ninja. Compared to the Successor of the Breath, this one doesn't exactly get an explanation given that Emily Su was merely a Revenant soldier. At best, one could figure she was inspired by Yakumo's likes in an odd way.
- Tragic Monster: Emily Su was transformed into the Successor as an experiment by Juzo Mido, who lost control of herself and attacked the party. Thankfully, the Protagonist can intervene and save her, allowing her to regain her sense of self in her new Successor body... or just put her out of her misery.
Successor of the Throat
The Successor that was recently sent into frenzy by Mido and awaits at the Crown of Sands. An angelic figure with a flower in one of its eye sockets and purple halo-like appendages sprouting out of her shoulder blade.
- Dishing Out Dirt: She attacks primarily by flailing giant sand claws and creating sharp blades from the sand.
- Foreshadowing: As seen below in Humanity Ensues, they can be restored back to their original Revenant form. Turns out that in the Golden Ending, so can the other Successors once the Relics are finally pacified by the Protagonist once and for all.
- Humanity Ensues: Up to Eleven in her case. If the Protagonist restores Eva Roux's Vestiges in time, they not only get their life and memories back, but they're also restored to their former glory as a Revenant, instead of being stuck inside a Successor body. This can be explained as the party being able to provide treatment for Eva Roux's recent transformation much earlier, in contrast to the other Successors who were permanently mutated into their forms by the time they were encountered.
- Mana Burn: Her attacks cause the Leak status, depriving you of Ichor and the ability to use Gifts.
- Multi-Armed and Dangerous: She has two pairs of arms, one of them is holding Eva's body inside her chest.
- Bloody Murder: After he Turns Red, his sword swings are followed by blood trails.
- Book-Ends: The first Successor the party encountered was the Successor of the Ribcage, which looks like a wolf merged into the body of a woman. The Skull King is a werewolf-like creature. Both bosses are also fought in two phases.
- Dual Wielding: With a BFS in each hand.
- Eldritch Abomination: The Virgin Born form, owning to its alien appearance.
- Final Boss: The Skull is the final enemy players need to defeat in order to complete the game. At least for the "Heirs" ending.
- Gameplay and Story Integration: A minor case, but the Skull King was originally a Revenant who utilized a Type Hound Blood Veil. As a result, he is the only Successor who uses their Blood Veil.
- Lightning Bruiser: The Skull King is very fast, and can catch unprepared players off guard if they aren't careful.
- Mechanically Unusual Fighter: The Virgin Born's lack of weapon, greater size, and vastly different skeleton is one reason why it's considered difficult for some, as it's quite different from everything else you've fought up to this point.
- Monster Progenitor: Zigzagged. The Successor of the Blood was the first Successor to exist, but Silva was the one who ordered the creation of other Successors, with him being the first and most important to undergo the process of becoming one.
- No-Sell: Both the Skull King and Virgin Born are immune to Standard Status Effects and highly resist elemental damages. While the Skull King is weak to Fire, Ice and Electricity, the Virgin Born resists all elements, including Blood.
- One-Winged Angel: After his initial defeat, Silva pulls more Relics into his body and turns into the monstrous Virgin Born.
- Our Werewolves Are Different: Ironic considering he's a vampire-like creature, but the Skull King looks like a hellish werewolf slash Cerberus monster whenever it uses its Blood Veil.
- Xenomorph Xerox: The Virgin Born's appearance has elements of a Xenomorph Queen.