If you liked the Zero no Tsukaima: Futatsuki no Kishi anime, the Anime-Planet community thinks you'd like:
The year is 2022, and gamers have lined up on launch day for Sword Art Online, a hotly-anticipated MMORPG that lets players connect to an immersive virtual reality world with special helmets called Nerve Gear. Kirito is one such gamer who's eager to jump back into action, having spent a great deal of time as a beta tester, and quickly becomes friends with newbie warrior Klein. But soon, Sword Art Online's 10,000 players discover that not only are they unable to log out, the only way they can return to their physical bodies is by beating the 100-level tower's final boss - that is, if their HP doesn't drop to zero first, for death in the game means death in the real world. Now, with no one else to turn to, Kirito and the other participants must survive the game as best they can – some forming guilds, others ruthlessly leaving their peers behind, and many tragically falling by the wayside or to the merciless monsters populating the lands...
Both are themed in a fantasy world based on swords and magic. They also have a lead male character with special fighting abilities that they use to protect the ones they love. Both anime's have similar looking characters and they both include humor (more so Zero no Tsukaima), action, and romance. If you love one, you've got to love the other
Rhiannon is the fair and gentle daughter of a village chief. Unfortunately for her, she's also exactly the sort of maiden who is needed as a sacrifice to wake the Demon King Arawn from his thousand-year slumber and is soon kidnapped for this very purpose. However, when Arawn is summoned, he decides to spare Rhiannon's life, instead killing her captor and freeing her from mind control. Taken with his kindness, Rhiannon immediately decides to marry the Demon King, making him the new village chief. All of this is bad news for Rhiannon's protective but hot-headed brother Arthur, who must now pledge his knightly service to his new Lord, Arawn. Together the three of them must journey and together they must fight, encountering new friends and new foes along the way.
Both main characters are summoned from another world/dimension. They both are sword users but in tears to tiara the main character is highly skilled from the start. They are both harems with many different women falling in love with the main character, but Zero no Tsukaima is more open about that. If you like adventure, wording fighting and magic fighting either one is a very good choice.
The eccentric Suzumiya Haruhi wants nothing more than to meet aliens, time travelers and espers… but she’ll have to settle for the everyday Kyon instead! Along with the mysterious Itsuki and the vacant Mikuru, the duo forms the SOS Brigade – a club whose mission is to discover the mysteries of the world. Armed with a razor sharp wit and a skill for manipulation, Haruhi will stop at nothing to have fun at all costs, even at the expense of Mikuru’s dignity!
Both stories revolve around a girl who is looked down upon by her peers and find enjoyment with the main guy character. Both are in school settings, even though Zero no Tsukaima is set in a school of magic, mysterious and supernatural events occur in Suzumiya. Many of the characters share the same personality traits as well. Louise and Haruhi are bossy. Both Saito and Kyon are forced in some sense to be with the respective female protagonists.(FYI, not in forced in love, I couldn't find a better way to word this)i Also minor characters are very similiar too. Overall, both are very good and comedic animes.
Cecily Cambell just wants to be a Knight and protect her home like her father and grandfather before her. There's just one problem: she’s incompetent! During a fight with a crazed swordsman, Cecily’s cherished blade breaks; and just as she’s about to be cut down, a man named Luke comes to her rescue wielding a katana - a blade unlike any Cecily has seen before. Together they must ensure that the Demon Sword Aria doesn’t fall into the wrong hands, and Cecily alone must prove herself worthy of her very own katana.
Zero no Tsukaima (or Zero's familiar) and The Sacred Blacksmith remind me of each other, mostly because they both inherently put most of their time into combat or a little of romance between characters present. Zero is much longer and more drama/romance driven than The Sacred Blacksmith (it is also more wacky) but they both juggle those two concepts constantly.
In the kingdom of Urak, the tower of Druaga is a source of fear and death; it is the cause of disease and monster attacks, and climbing it is impossible given the ferocity of the monsters within – until now. It is the Summer of Anu, a period that occurs once every five years during which the monsters are weakened. Jil, a guardian, is one adventurer whose goal is to reach the top level and slay the tower’s creator, the demon Druaga, and finally bring peace to Uruk with the help of a powerful artifact found within. However, Jil and his friends aren’t the only ones who aim for the top; it’s a race to the finish!
Both series are really funny stories of a boy who is completely unsuitable for the role he has to play: a swordsman. In both stories the boy have to protect a witchand together they have a lot of advantoures on their way to love.