In Frankenstein, how does Victor feel about Elizabeth when they're children?

Victor adores Elizabeth and sees her as a cherished gift, his favorite companion, and his responsibility.

They consulted their village priest, and the result was that Elizabeth Lavenza became the inmate of my parents' house—my more than sister—the beautiful and adored companion of all my occupations and my pleasures.

Everyone loved Elizabeth. The passionate and almost reverential attachment with which all regarded her became, while I shared it, my pride and my delight. On the evening previous to her being brought to my home, my mother had said playfully, "I have a pretty present for my Victor—tomorrow he shall have it." And when, on the morrow, she presented Elizabeth to me as her promised gift, I, with childish seriousness, interpreted her words literally and looked upon Elizabeth as mine—mine to protect, love, and cherish. All praises bestowed on her I received as made to a possession of my own. We called each other familiarly by the name of cousin. No word, no expression could body forth the kind of relation in which she stood to me—my more than sister, since till death she was to be mine only.