Spoilers for Kumo Desu, but sometimes a family is:
A depressed elf mom, a buff knight mom, a little sister that should be in jail, a older brother that's everyone in a fifty mile radius' boss, an older sister you've never seen in your life, god, god's girlfriend (also a god), an adoptive older brother figure (who's also the god), a handful of not-quite adoptive siblings of various moralities and number of war crimes, a random spider that is one of the siblings queerplatonic partners, their unoffically adoptive daughter and her basically-dad, your teacher, those queerplatonic partners asexually created daughters and granddaughters, satan, your girlfriend, your boyfriend, and you, a guy.
(Anna, Kleava, Sue, Leston, what's-her-name, Gülie, Sariel, Hyrince, the kids from Sariel's orphanage, White, Sophia, Mera, Oka, Taratects and the Vestiges, D, Katia, and Wrath.