Father: The Legendary Devil Hunter - Dante Sparda Redgrave 

Mother: The Legendary Huntress - Summer Rose 

Stepfather: The Mighty Brawler - Taiyang Xiao Long 

Older-brother: The Dark Prince - B/N Sparda 

Stepsister: The Sunlight Brawler - Yang Xiao Long

Half-sister: The Blooming Rose -Ruby Rose

Uncle: The Alpha and the Omega - Vergil Sparda

Cousin: The Resourceful Devil Hunter - Nero Sparda 

Uncle: The Dusty Old Crow - Qrow Branwen 

Cousin: The Gifted Psychic - Kasane Branwen

Aunt: The Spring Maiden - Raven Branwen

Grandfather: The Legendary Dark Knight - Sparda

Grandmother: The human mother of Dante and Vergil - Eva

That's all for Y/N's family members. For what crossovers that are in this book, I'm mainly putting in Devil May Cry, Fairy Tail, RWBY, Final Fantasy 7, Borderlands, Edens Zero, Bayonetta, Kaiju No. 8, and Scarlet Nexus. 

I will be add some characters/monsters from other franchises as well to make it interesting. Anyway, if guys have some ideas of what harem members you want us to have, let me know at the comments below. Peace out and enjoy!