Katarina, whose nickname is Kat, is shown here at 7 years old. Her default form is the center one, which I call her semi-werewolf form. She has the ability to change at will from this form to her semi-bunny form (on the left, in which she has erect ears rather than lop, like her mother, probably due to her werewolf genes) or to her fullblown werewolf form, in which form her pupils change from round to slitted shape, giving her a much more feral look.
This young, she doesn't have complete control yet and the waxing and waning of the moon can affect her ability to change profoundly. As she ages though she will gain full control over her transformations, possibly even finding the ability to change partially or further in either direction or even into other forms completely. Considering who her mother and father are I wouldn't be surprised, for instance, were she eventually able to transform to completely feral rabbit or wolf. As with the rest of Liane's children, Kat has inherited vampirism, and so is a vampire bunny/werewolf hybrid. She maintains the facial freckles that she got from Liane in all her forms, and other than these and green eyes is completely black in color. (she is rendered here in flat black with no shading so that any artist who is doing a picture of her can grab her basic color anywhere on her body and then go on to shade her in their own fashion if they are doing a shaded picture)

Katarina's father is Ivan, a Russian werewolf who, due to a potion taken when he was a spy for Russia during the cold war, is stuck in feral form except when he becomes aroused. When that happens he transforms into a form similar to the one that is Kat's default form. This happened accidentally one night when he and Liane were just wrestling for fun in front of the fireplace and ....well......you know how it goes sometimes. The heat of the moment and all that. Jessamine, who watched the whole thing from the couch with much interest, is still kidding Liane about her 'wolf lover'.

Fabulously thought out and executed art of Kat's 3 forms are thanks to  saltypaw to whom the art is ©.

Katarina Veronika Rabbitfangs, nicknamed Kat, is © to  rabbitfangs