Great!
First of all, i love your character designs and the way you executed them. i realize that you've just started this series (if that is what youre aiming for), but this story and animation in absolutely SATURATED in cliches. the awakening of vampires in modern times; the use of a young vampire w/ human as subject characters; the search for a lost item that will grant immeasurable powers...it has all been done before and the fact is painfully obvious. you've just started this series, so you have oodles of time to start saving your story from the pit of cliche hell; add stuff that people rarely or have never seen before! like for instance, making that leo guy the illegitimate child of dracula and a human, causing him to ultimately have weaknesses, and as an even bitchier twist, make the elizabeth chick the daughter of leo's human mother from a human father, so they end up being related or something! i don't know! whatever you conjure up in your head will f course b up to you. you've got a great start - its just time to veer to the sides a bit instead of keeping in the same lane as everyone else.