Brother and Sister

Here are some of my characters of "Concealed Wings" one of my manga project.
Like the title says, there are brother and sister; the boy is named Gueran and the girl Lidwine (his little sister). They very often quarrel ! xD Gueran is very defender with his sister and he doesn't want her to wear mini-shorts of skirts because is he afraid that the other boys look at her ! x3