Hippolyte's Links
Hippolyte is Argyros' older brother. He was already a teen when she was born, and took his grand-brother responsabilities seriously. He took great care of her, helped with a loving and devoted mother. They grew close and complices despite being very different in their personality and interests. They still live together. They sometimes argue due to their different views on thing, especially their views of a "clean and tidy room", but it is never with angsts and never lasts long. They keep a sweet and loving relationship.
Despite Cassandre being really close to his sister, and despite them having a somewhat similar personality, Hippolyte and Cassandre actually does not like each other. Cassandre will show some respect to the dear brother of her friend, but does not enjoy spending time with him, and will rather avoid him. He likes to annoy them and easily manage to irritate her until they argue and she ends up sulking. Maybe Hippolyte actually likes her, though.