Romantasy readers, assemble. If you’re still recovering from the first book in the Fae & Alchemy series, welcome—you’re in good company. We’ve already unpacked the chaos of Callie Hart’s Quicksilver, but now it’s time to meet the real stars of the show: the characters who launched a thousand BookTok thirst traps and gave the enemies-to-lovers trope a whole new layer of emotional damage.
In this post, we’re breaking down the main characters and side favorites that make Quicksilver such an addictive read. For more world-building, backstory, and magic system intel, check our Quicksilver summary. We’re not saying you’ll fall for Kingfisher, but we’re also not not saying it.
Looking for more shadow-daddy content? Take a look at our ACOTAR, and Fourth Wing characters breakdown. For a more contemporary dark representation, check out Haunting Adeline characters.
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Expect thirst. Expect drama. Expect spoilers.
Meet our main girl: thief, survivor, big sister, and now… the only living Alchemist in existence? Casual. Saeris is everything you want in a fantasy romance heroine—scrappy, smart-mouthed, and emotionally armored from years of surviving in Zilvaren, a kingdom that treats water like currency. She’s got that gritty resilience trope nailed down, plus a protective streak that makes her dangerous when it comes to the people she loves—her little brother, and eventually, someone taller and moodier.
What makes her shine? She’s no chosen-one clone. Saeris stumbles through her power with bloody knuckles and sharp comebacks. And while she does have a destiny, she’s not about to let fate boss her around. Her spirit is fierce as her heart is compassionate. Adopting little Onyx, a white fox, even if Kingfisher bullies her for it, is an indicator of her kind nature. Watching her unlock the truth about her magic—and herself—is chef’s kiss.
And now, the man, the myth, the meltdown: Kingfisher.
He’s fae, he’s feral, and he’s fighting a war inside his own mind. Oh, and he may or may not be fused with quicksilver, haunted by his past, and rocking the tormented warlord trope like it’s his birthright. From the second he shows up—emerging from a silver pool like the goth version of Poseidon—you know you’re in for it.
The enemies-to-lovers tension between him and Saeris? It’s not a slow burn, but a smoldering blaze wrapped in sarcasm, sword fights, and “I’d kill for you, but I’ll never say it out loud” energy. He trains her, taunts her, and low-key worships her strength, all while pretending he’s emotionally unavailable. Classic. They are even on a pet-name basis. He calls her Osha, a butterfly that is born and dies on the same day.
But peel back the grim sarcasm, and you’ll find a man with loyalty tattooed into his soul. Magical bond-ink, anyone? He’s more than a love interest; he’s a walking battlefield of secrets, grief, and slow redemption.
Quicksilver isn’t just a two-person power trip—it’s a full-blown fantasy book ensemble, with side characters who bring emotional stakes, world-building weight, and occasionally chaos. Whether they’re from the fae realm of Yvelia or still stuck surviving in Zilvaren, every name here matters.
Let’s start with the heart of it all. Hayden isn’t just Saeris’ little brother—he’s her moral compass, her soft spot, her reason to keep going. And so, when he is captured by the Queen’s Guard with the gauntlet Saeris stole, she loses it.
In a book filled with killers, queens, and creatures from beyond, Hayden stands out for his goodness. He dreams of learning, not fighting. A cinnamon roll in a world full of poisoned daggers. But don’t mistake softness for weakness. Hayden becomes a key pawn in the larger game between realms, and it’s his capture that forces Saeris to embrace her hidden identity. He’s the symbol of what’s worth saving. And that’s powerful.
Oh, Carrion. The name says it all; there’s death, regret, and way too many unresolved feelings here. Saeris’ past with him isn’t just romantic; it’s deeply tied to her pain, survival, and what she once believed love could be. And just when she’s figuring out how to live without him… boom. Kingfisher pulls a BookTok-level plot twist and brings him back.
Carrion might still think their bond holds, but let’s be honest: he’s the walking reminder that what you survive isn’t always what you need. Still, his presence in the fae realm stirs the pot in all the right ways—especially when Kingfisher’s around.
Everlayne starts off like the typical pretty royal; sweet, helpful, maybe even a friend? But this is a fae realm, and nothing stays simple for long. Her role gets darker once Malcolm enters the picture (more on him in a sec), and Everlayne ends up on the wrong side of fate.
Her transformation into one of Malcolm’s own is the ultimate betrayal, and it hits especially hard because Yvelia raised her to be better. Whether there’s hope left for her remains to be seen, but one thing’s for sure: her arc hurts.
Ren is that ride-or-die fae warrior you can’t help but trust—until you start wondering why he’s so loyal to Kingfisher in the first place. His blade is always ready, his vibe is always stoic, and his eyes definitely say, “I’ve seen some stuff.”
But under that cool exterior is a complicated man with motives we’re only beginning to understand. Ren’s loyalty isn’t just political—it’s personal. Possibly tragic. And definitely full of potential for future heartbreak. We stan a loyal fae with secrets.
Lorreth deserves his own spin-off. He’s brash, deadly, and says the kind of things that make you laugh and flinch. Every fantasy book needs a warrior who’s as dangerous with words as he is with weapons, and Lorreth fills that role beautifully.
He’s part of Kingfisher’s inner circle and a trusted fighter in the war against vampires. But what makes him stand out is his ability to ground the story with humor and humanity. Basically, the friend who’ll stab a vampire mid-sentence and give you a pep talk after.
Long live the Undying Queen—unfortunately. From the second Saeris is dragged into Madra’s court, it’s clear this human queen is not messing around. Immortal, ruthless, and obsessed with control, Madra rules Zilvaren like a predator in silk. Her fear of fae bloodlines and desperation to stay in power make her a threat even the fae should respect.
Her presence is a warning: when humans crave immortality, they become something worse than fae or vampire. Madra isn’t just a villain; she’s the mirror Saeris could become if she lets power consume her.
Every good romantasy needs a Big Bad. Malcolm is that and then some. He’s ancient, calculating, and always three steps ahead—whether he’s turning Everlayne or setting traps in cursed labyrinths. What makes him terrifying isn’t just his power; it’s his precision.
He knows how to break people before he ever lifts a finger. And that makes him the perfect foil for Kingfisher, who’s spent his life trying not to become the monster Malcolm already is. If the fae realm is holding on by a thread, Malcolm is the blade coming to cut it.
Callie Hart didn’t just deliver a romantasy book. She writes power dynamics that hit hard, characters with emotional depth that bleed on the page, and bonds that feel as dangerous as they are delicious. The hype around this series? Totally earned. And with the next book in the Fae & Alchemy series on the horizon, you’re gonna want to know exactly where everyone stands.
So if you haven’t already joined the BookTok masses, it’s time. Add Quicksilver to your Amazon cart, load it up on your Kindle, and prepare to emotionally spiral in the best way possible. Just maybe have snacks, tissues, and a morally gray playlist ready.
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Saeris Fane is a fiercely loyal, sharp-witted survivor with hidden alchemical powers and deep emotional scars. She’s guarded, morally gray, and driven by love, revenge, and the need to reclaim control over her fate.
The primary love interest in Quicksilver is Kingfisher, a formidable Fae warrior from the realm of Yvelia. Known for his brooding demeanor and mysterious past, Kingfisher’s complex relationship with Saeris Fane evolves from tension to deep connection, embodying the enemies-to-lovers trope.
Nikki Sheryee insists that she’s “up to no good” whenever she’s in the company of books. Armed with a degree in English Language and Literature, she wields the power of words like a mischievous wizard. Her lifelong dream? To be the editor who sprinkles magic dust on manuscripts! To Nikki, a book is more alive than a caffeinated squirrel on roller skates. Readers nurture it, cuddle it, scold it, and occasionally challenge it to a duel! But in the end, a book does its own thing, pulling at our heartstrings and revealing our inner human-ness. Nikki’s favorite pastime? Well, it’s none other than the noble art of daydreaming! And she wears her daydreamer’s badge with pride, sharing this delightful delusion with the crème de la crème of her friends.
