Bleach 120

[Necromas]

In the preview it's shooting energy out of its mouth, so it probably has more abilities when hes not limited.

Lets not forget that Renji also just recently learned his bankai, as compared to the usual 10 years of training needed to master most bankai (Ichigo's is an acception because it retains the same exact fighting style of a normal sword and isn't wierd or oversized or anything). So he probably has something more then just an energy attack that he'll learn in future episodes (though for now it's prolly just a generic energy beam and the ability to break up).

I could have sworn that they said something about him being a genuis or a decendent of someone special, so I will agree that he has room to grow. -dg-

From the bleach wiki, Removed link full of spoilers
"During his duel with Gin Ichimaru in the anime, Ichimaru remarks that Hitsugaya is the embodiment of the heavenly guardian that is born into Soul Society every few centuries. This may explain his rapid growth and why he is a respected captain despite his age. Alternatively, Gin may have been speaking sarcastically, saying that Hitsugaya did not seem to live up to his title. His given name is also a homonym for a casual Japanese term meaning "amateur" (藤四郎), possibly referring to Hitsugaya's young age and inexperience relative to the other captains of the Gotei 13."