Can You Guess Who I Voted For?

Can you guess who I voted for?

BMO x Air

First on-screen romantic interaction: BMO Lost

Known romance: Got to know each other while searching for home; Air (as Bubble) proposed to BMO, but was popped and seemingly destroyed just as BMO accepted. However, Air remembered who it was, revealed its identity to BMO, and promised to be with him every moment of the day.

Lumpy Space Princess x Brad

First on-screen romantic interaction: N/A

Known romance: Dated and broke up before the series began; according to Lumpy Space Princess, they broke up because Brad tried to kiss her on the mouth and she rejected him