Shakugan no Shana, Ookami-san to Shichinin no Nakama-tachi Recommendations
It appears that the girl who acted strong but weak inside is very common in Japan. And that girl being saved by a total bum is even more regular.
And if you are a bully, please be aware of that so-called total bum as he may have hidden power yet to be unleashed.
These anime are similar because:
*The leading fighter is the girl with outstanding power
*Both girls are very similar! Are very brave, cold towards world but surprisingly warm inside
*They both have a boy with them who could watch their back and they both are kind of in love with the main char
* The setting is different Ooksmi-san is based on school life and Shakugan let's say is more global
*Shakugan is darker and less funny or happy
*Ookami just started to air