Most Powerful Familiars In Isekai Anime

Fans of Isekai Anime might have already noticed that in most of the cases where a main character is summoned to another world, they end up having a powerful companion or familiar that follows them around and helps them during battle. In those scenarios, these creatures are either summoned, hatched from eggs, or have another kind of fateful encounter with the protagonist throughout their adventures.

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This article analyzes the most powerful familiars in Isekai Anime, considering speed, attack power, magical power, utility, and most importantly: how broken they are. From a wolf that lives in the shadows, ready to jump at their master's call to a near-deity beast lord of the forests, that only wishes to feast on yummy food and has a really bad temper.

5 Jet (Reincarnated As A Sword)

An Ever-Evolving Shadow Wolf, Capable Of Incredible Combat Feats

Jet, an evolving monster summoned by Master, the reincarnated Japanese office worker turned into a sword, was originally an Onyx Wolf, a minor wolf species that due to the power of the Isekai'd talking blade, evolved into a powerful Darkness Wolf. This creature is capable of merging with the shadows and loves to live inside Fran's shadow. His namesake comes from the Jet-Black color (Urushi in the Japanese version) of his fur.

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This familiar not only has the power of using the shadow to teleport himself across narrow spaces and through matter, but he can also jump at vertiginous speeds across various surfaces, masterfully weakening the prey before eliminating it. Fran can also summon Jet at will, use it as a mount, and reach incredible terrain traversing speeds on his back. This proves that Jet is not only strong, but fast and resilient, and he keeps growing more and more. Master even thinks he will become as powerful as a S-Rank monster someday.

4 Pigimaru (Failure Frame)

They May Think A Slime Is The Weakest Monster, And That Will Be Their Last Mistake

The rejected hero Touka, seeking revenge on those who left him for dead, and the evil Empire chasing Seras, his beloved companion, has a pet slime named Pigimaru, who is as broken as his cheat skills. Pigimaru can not only become a living armor and protect his owner but it was also evolved using the Forbidden Arts found in an old journal that belonged to a forgotten Sage.

Pigimaru's skills include expanding its body greatly and using its tentacles to attack and attach curses, penetrating protective barriers in the process, but it is also capable of shapeshifting at incredible speeds, becoming a living weapon that greatly enhances Touka's combat abilities. All things considered, this little slime is as broken as the MC, and counts like two people constantly casting multiple curses at the same time, creating an endless barrage of suffering for their foes.

3 Night (I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too)

She May Look Small, But Don't Underestimate Her

Night is a Black Fenrir cub, a powerful monster who is over level 500 when Yuya meets him in the Other World forest while hunting an Orc Emperor. Since the creature was hurt and cornered by the monster, she was distrustful of the young Japanese isekai'd student, but after a while, she started to follow him around and ended up becoming like a pet to him.

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This small cub is by far one of the cutest and strongest creatures that becomes an MC's familiar in an Isekai anime. Even comparing him to the other monsters in terms of raw power, Night gets out of the scale not only in level, but in speed, magical power, agility, and intelligence. Night has demonstrated the ability to detect the most stealthier of creatures. Even royal assassins are no match for her detection skills. She is also quite fond of Akatsuki, Yuya's other pet and another broken living being of this fantastical world.

2 Filo (The Rising Of The Shield Hero)

The Queen Of All Bird Monsters, With Incredible Strength And Shapeshifting Skills

When Naofumi incubates the small monster egg sold by the mischievous Slave Trader, he never imagined that a little chick-like monster would come out of it. Even more so, this small creature grew by leaps and bounds, surpassing other similar monsters of her species. He named it Filo, and to his surprise and that of Raphtalia, the creature soon acquired the ability to speak and turn into human shape. The latter has stirred some trouble, especially since Motoyasu, the spear hero has somehow fallen in love with her and chases her around every time he gets. Though Filo knows perfectly well how to blast this punk away, and does it with extreme prejudice.

This familiar is a Filolial Queen, the apex of the Bird-like monsters of Raphtalia's world, and one hell of a fighter too. Filo possesses great strength, speed, and agility. She is able to pull a heavy carriage full of equipment and people and does so at an incredible velocity. In her human shape, she can fly up to certain distances, and fight using her monstrous strength, wielding weapons or specialized combat gloves. Though lately, she prefers to use a Flail, since the Colosseum Tournament arc, where she picked up that weapon as her new favorite. She also has shown the ability to soothe and power up her companions with her singing.

1 Fel (Campfire Cooking in Another World with My Absurd Skill)

The Most Powerful Familiar, Not Even Dragons Stand A Chance Against Him

In Nordic literature, Fenrir is the demonic wolf that comes to devour the world in the last battle: Ragnarök. In the Campfire Cooking in Another World with My Absurd Skill universe, Fenrir is a monster wolf, with extreme power. Qualified as an S+ Rank, a living walking disaster capable of exterminating even an Ancient Dragon. In other words: the most powerful creature, and a proud and aggressive one at that. On the other hand, the summoned protagonist of this Isekai is quite a reluctant hero and ends up coming across this Fenrir monster by mere chance while cooking.

But, this particular Fenrir, named Fel by the MC of this Cooking in Another World anime, has a weakness: Food. Fel cannot resist the flavor and the smell of cooked meat and uses his imposing nature to force Tsuyoshi Mukouda to form a contract with him. As long as the protagonist keeps Fel fed and happy, he is willing to let him borrow his power, and protect him while he hunts new meat and ingredients to make even more delicious dishes. As the apex predator of the world, this familiar is the most powerful sidekick an adventurer could have.

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