Family Ties

Danny and Della Green are brother and sisters, who co-own the bar "The Greens." Although not related by blood, the two share an intimate brother-sister bond.

Early Years
Danny and Della met each other during middle school as Della joined the Greens family at age 13. When they first met, the first impressions were terrible. Danny never really approved of Bianca Park, Della's birth mother, so he was very skeptical of Della as well. They did not communicate much, mostly due to Danny's negligence and Della's silence. They went to same middle school and high school, when Della became one of the 'cool' kids in the school. Since then, Danny became nicer to his younger sister as his friends asked for Della's phone number and Della dated a star quarterback.
 * Danny and Della had a 'Hello Day' party, celebrating the day Della and Bianca joined the family. The first party was a disaster, as Danny gave Della a dog for a present, but it turns out that Della is terrified of dogs.
 * Danny, as per request, tried multiple times to set Della up with his friends. The biggest disaster was a friend named Stuart, who wet himself as they met.

Nowadays
As time went by, Danny and Della became best friends who care for each other. However, they still are a duo who mostly bickers about almost everything. They mostly fight over topics like Danny's college girls, Della's love for guns. Danny accuses her of being 'cruel and heartless' over owning three Glocks, and Della calls him a 'pretentious douche' and 'pathetic thirty year old.' Interestingly, the two get protective of each other whenever other people talk about their siblings.
 * At multiple occasions, the two pretend to be a couple: for example, pretending it's an anniversary to get free cakes at restaurants.
 * As Della and Sid got together, Danny got furious at his sister, saying "you deserve so much better." Della tells the same to the college girls who Danny sleeps with.