Zero no Tsukaima: Princesses no Rondo

Both Shakugan no Shana and Zero no Tsukaima have very similar relationships between the main hero and heroine, even their appearances and personalities are very similar. The personalities of secondary heroines are also almost identical in both animes. Both have the heroine and hero fighting side by side, with heroine controlling a stronger power and the hero acting as a bodyguard most of the time. 

-Tsundere heroines -Main boy character with same kind of special power -Same aspects -Comedy, Magic and Romance genres -There is a character who is or dresses up as a maid in both anime 

These anime are almost the same plot but the roles are reversed as the girl is the one summoned in Seikoku no Dragonar. Both Anime shared the same style of comedy and have great animation. If you enjoyed zero no tsukaima you will also like this. :) 

Does two animes are to similar. Both protagonist come from modern world to medieval one than they both become servant of noble girl and they both eventually become heroes they both start to hawe filings for that girl but they refuse to admit it and both protagonist are nearly same caracters as well as that girls both protagonist are suraunded with prety girls that are in lowe with him both animes are Action/Comedy/Romance/Harem and both are very good animes. 

Louise and Aria have a lots similarities - Pink hair - Tsundere - Short - Take main male chara as slave - same voice star by Kugimiya, Rie  

Both anime have a similiar ending and plot... a mystery, a incident between the both kingdoms and a boy who want to protect the girl but she will always punch him when he will do something dumb :D 

The main male character is beaten up by the object of his affection daily