Let’s be real for a second. When In Another World With My Smartphone (Isekai wa Smartphone to Tomo ni) first dropped, people basically lost their minds over how "generic" it looked. A guy dies because God makes a mistake, gets a super-powered phone, and builds a harem? We've seen it. But here is the thing: the In Another World With My Smartphone main characters are actually why this series has stayed relevant for years while other seasonal junk fades away. It’s not trying to be Re:Zero. It’s cozy.
Touya Mochizuki isn't your typical brooding protagonist. He is just a polite kid who happens to be a literal demigod with 5G.
Most people watch for the spectacle, but if you dig into the light novels by Patora Fuyuhara, the character dynamics are surprisingly tight. You’ve got a mix of magical prodigies, samurai, and literal royalty. It is a weird chemistry. It works.
Touya Mochizuki: The OP King of Convenience
Touya is the heart of the show. He’s 15. Well, he was 15 when he died by a stray bolt of divine lightning. Honestly, God felt so bad about the whole "accidentally killing a teenager" thing that he gave Touya a massive stat boost and let him keep his smartphone.
He is basically a cheat code.
Because his body was rebuilt using materials from the Divine Realm, Touya can use every single type of magic. All elements. Null magic too. He doesn't even need to chant most of the time. But what makes Touya interesting isn't just that he can nuke a forest; it’s that he uses his phone to look up recipes for ice cream or create a map of the entire world. He’s a guy who wants a quiet life but keeps accidentally becoming a king.
You’ll notice he’s incredibly pragmatic. If a villain is giving a monologue, Touya might just shoot them with a magically enhanced Brunhild (his gun/sword hybrid). No drama. Just efficiency.
The Smartphone Factor
The phone isn't just a gimmick. It’s an extension of his character. He uses it to bridge the gap between Earth’s culture and the fantasy world of Brunhild. Whether he's downloading new spells or just checking GPS, it makes him the ultimate "prep time" hero. He is never caught off guard because he literally has the internet in his pocket in a world that hasn't invented the steam engine.
Elze and Linze Silhoueska: The Foundation
The Silhoueska twins are the first In Another World With My Smartphone main characters we meet, and they set the tone for the entire party. They aren't just background noise.
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Elze is the physical powerhouse. She’s the older twin, even if only by a bit. She uses gauntlets and a "Boost" spell that multiplies her physical strength. If you need a door kicked down or a monster's skull cracked, Elze is the one. She is straightforward, a bit tomboyish, and the first to actually confess her feelings. It’s refreshing. Most anime heroines take three seasons to say "I like you," but Elze just goes for it.
Then you have Linze.
She’s the magical specialist. While Touya is a jack-of-all-trades, Linze focuses on fire, water, and light magic. She’s shy, quiet, and incredibly observant. She often acts as the emotional anchor for the group. It’s easy to overlook her because she’s not as loud as Elze or as aggressive as Yae, but her versatility in combat is what keeps the team alive in the early arcs.
Yae Kokonoe: The Samurai Spirit
Yae brings a different flavor to the group. She’s a wanderer from Eashen (the anime version of Japan). She’s looking to test her skills, and she ends up finding a home with Touya.
She speaks with a very formal, archaic tone—ending sentences with "de-gozaru." It’s a trope, sure, but it fits her rigid discipline. Yae is probably the most dedicated martial artist in the group. While the others rely on magic or innate talent, Yae is all about technique. She practices her swordsmanship every single morning.
Her relationship with Touya is built on mutual respect for strength. Also, she eats a lot. Like, a terrifying amount. It’s a running gag that actually humanizes her. She isn't just a killing machine; she’s a girl who really loves a good meal and cares deeply about her family’s legacy.
The Royalty: Yumina, Rue, and Lucia
As the story progresses, the scale moves from "adventuring party" to "international politics." This is where the royal members of the In Another World With My Smartphone main characters roster come in.
- Yumina Ernea Belfast: She’s the one who started the whole marriage thing. She has the "Mystic Eyes of Intuition," which lets her see a person's true nature. She saw Touya was a good soul and decided, at age 12, that she was going to marry him. Bold move. She’s the diplomat of the group.
- Lucia Rea Regulus: The third princess of Regulus. She’s a bit of a bridge-builder. She gets along with everyone and is particularly skilled with a small sword, though she’s mostly known for her competitive spirit in the kitchen.
- Hildegard Minas Restia: A knight-princess. She doesn't just sit in a throne room; she wears armor and fights on the front lines. Her interaction with Yae is great because they both share that warrior's bond.
The Enigma of Leen and Paula
Leen is a Fairy. She’s also over 600 years old, though she looks like a teenager. She is the one who introduces Touya to the ancient Babylon technology.
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Leen is mischievous. She teased Touya for years before joining the harem officially. She’s the smartest person in the room 90% of the time, and she knows it. Her companion, Paula, is a sentient teddy bear that moves and acts on its own. It doesn't speak, but it has more personality than most side characters in other shows. Paula is the comic relief that actually feels earned.
Why the Babylon Androids Matter
Later in the series, the cast expands to include the gynoids (androids) who manage the flying islands of Babylon. Francesca, Rosetta, and the others aren't just servants. They represent the "Old World" technology that Touya is slowly reclaiming.
Each android has a distinct, often eccentric personality. Francesca (Cheska) is... well, she’s a bit of a pervert. Rosetta is the master mechanic. They add a sci-fi layer to what started as a standard fantasy. This shift is where the series differentiates itself. It becomes a story about building a nation, not just leveling up.
The Controversy of the Harem
You can't talk about these characters without mentioning the marriage aspect. It’s a point of contention for many viewers.
In most isekai, the "harem" is just a bunch of girls following a guy who is too dense to notice. In Smartphone, Touya eventually marries nine different women. It’s an actual plot point. They have a system. They have a schedule. They even have their own friendship groups within the marriage.
It’s handled with a surprising amount of maturity for a show about a magic phone. They discuss the political implications of Touya marrying princesses from different nations. It’s not just about romance; it’s about stabilizing the world. If Touya marries a princess from every major power, nobody wants to go to war because they’re all technically family. It’s "Marriage Diplomacy" at its peak.
Combat Synergy: How They Fight Together
One thing the anime sometimes glosses over is how well the In Another World With My Smartphone main characters actually coordinate.
Touya acts as the "Overwatch." He stays back, provides buffs, uses "Slip" to make enemies fall over (his signature move, honestly), and teleports people where they need to be.
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- Frontline: Elze and Yae. They are the physical wall.
- Mid-range: Hildegard and Lucia. They handle the stragglers.
- Magic Support: Linze and Leen. They provide the heavy artillery and elemental control.
- Tactical/Ranged: Yumina (with her bow) and Touya (with his gun).
It’s a balanced RPG party. When they fight the Phrase (the crystalline invaders), you see these roles play out. They aren't just individuals; they are a unit.
Addressing the "Boring Protagonist" Myth
A common critique of Touya is that he is "too perfect." He is nice, strong, and everyone loves him.
But that’s the point.
The appeal of the In Another World With My Smartphone main characters is the lack of unnecessary friction. The world is full of enough stress; watching a group of people who actually like each other solve problems and build a peaceful kingdom is cathartic. Touya’s struggle isn't "Can I win this fight?"—he usually can. His struggle is "How do I handle the responsibility of being the most powerful person on the planet without becoming a tyrant?"
He spends a lot of time worrying about being a good husband and a fair ruler. That is a different kind of character growth than just getting a new power-up.
Actionable Insights for Fans and New Viewers
If you’re looking to get the most out of this series, don't stop at the anime. The anime is a fun, light-hearted introduction, but the character depth is in the light novels.
- Watch for the subtle world-building: Notice how Touya’s Earth knowledge slowly changes the economy of the world. He introduces things like cafes, bicycle-like vehicles, and newspapers.
- Pay attention to the "Null Magic": This is the most creative part of the magic system. Null spells like "Gate," "Search," and "Program" are unique to individuals. Touya’s ability to learn all of them is what makes him a god-tier character.
- Follow the "Phrase" arc: The story shifts from slice-of-life to a high-stakes mecha/fantasy hybrid. The characters have to pilot giant robots called Frame Gears. Yes, really.
The In Another World With My Smartphone main characters might seem like archetypes at first glance, but they evolve into a complex family unit that manages a literal kingdom. Whether you love the harem tropes or just want to see what a smartphone can do in a world of dragons, there is more beneath the surface than people give it credit for.
To dive deeper, start with the Light Novel Volume 1 or check out the manga for a more detailed look at the character designs. The second season of the anime also introduces more of the wives, so that’s a great place to see the group dynamic expand. Focus on the interactions between the girls when Touya isn't around; that’s where their true personalities shine.