A family.
It generally refers to a group of individuals who are connected by blood, marriage, or other significant relationships, providing emotional, financial, magical in this world, or social support.
'Family' often serves as a fundamental unit of society as not just the foundation upon which each 'character' is developed but the absence of this important element of nature also contributes to shaping identity, values, and one's role within a certain community.
"So… looks like everyone's here."
An orphan entering a family through their lover can create a unique and delicate situation. The orphan, who may have faced loss or might have had an eternal emptiness of this certain kind of important element, will likely be seeking emotional stability and a sense of belonging.
At least, that is what should happen in normal circumstances.
"We didn't really have to dress up now, did we? You made us do this on purpose, didn't you?!"