[Tempest35]

Hnnn, the rosary was activated after all that trauma she experienced ie. Seeing Akuha cut her mother in half, the awakening of her Shinso blood, Alucard, the actual sealing ceremony, seeing her mother 'eaten' before her very eyes, etc.

It could be argued that the seal also had to deal with 'sealing up' all that trauma as well, which made Kahula's trepidation on the subject understandable. Thanks to Akuha, we know that all references to Alucard in her memory have a 'block' on it, likewise, she's still fuzzy on her mother as well but that will cease probably during this very arc.

As for her forgetting that night(s), she probably does remember it as it being a very sad moment in her life but the specifics were lost to her due to the seal and to her getting older.

Now, as for the leaving the house bit - the most glaring thing was the 'living with her mother in the human world' - I always thought that was a mis-trans....and I've neglected to see how they worded it in SII English-side.