Gender modifiers and skin tone modifiers already exist. The two person holding hands emoji is actually implemented as person (with modifiers) + zero with joine

Gender modifiers and skin tone modifiers already exist. The two person holding hands emoji is actually implemented as person (with modifiers) + zero with joiner + handshake + zero width joiner + person (with modifiers) Which is great, because it's backwards compatible, showing up as 3 emojis unless the font has special handling.