Responses
Hmm..yami got lost on a fishing trip so he wasn't abandoned, noelle's mom died, idk about her dad but she wasn't abandoned, vanessa ran awayfrom her queen/mother, luck's mom died, zora's dad died, gauche's parents are dead we don't have any info on grey, charmy, magna or gordon's parents. The only ones who were really abandoned are henry and asta.
So basically the majority of Black Bulls are abandoned by their parents or don't have a good relationship with them. Since Charmy doesn't even know her parents are human and dwarf