I kinda hoping she stabbed him with the sword, as some kinda contract.  That make sense to her "fate" references.  I Do want him to get along with this transfer student, cause the childhood friend is just a dumb bitch making up bs rules.  She cant even follow her own rules, causing a sscene in the classroom cause he looked at a girl.   I guess the ending kinda proves she was attempting to slay a vampire, Cant blame her for that honestly.  I just going to hope theres a reason she didnt kill him still. It appears she left him alive.  Cant call yourself a Vamp slayer if you let your vampires crawl away and heal