Emerald Princess first appears in "Prisoners of Love," when she is kidnapped by Ice King. She also appears in "Loyalty to the King," where she is one of the princesses who wants to meet the Nice King (Ice King). Emerald Princess is one of the princesses that gets rejected by Nice King. She makes a cameo in the episode "Ricardio the Heart Guy," when Ricardio is giving Lumpy Space Princess a Best Friend Massage. She also makes a cameo in "Mortal Recoil" as one of the people following Princess Bubblegum into the hospital, and in "Wizard Battle," she is in the audience of the event. In "The Lich," the gem from her crown was taken by Finn and Jake as she slept. It is shown in "Princess Day" that she is considered a registered princess.
She is one of the very few characters in the series to have a nose. She wears a green dress with a yellow-green part and has a large emerald as a crown on her head. Like her dress color, her skin is green. She also appears to be wearing a hood or shawl, although this may be her hair or part of her crown. She has a particularly large posterior, but that may be a fold in her dress.
- "Prisoners of Love" (no lines)
- "Loyalty to the King" (no lines)
- "Ricardio the Heart Guy" (cameo)
- "The Duke" (pictured)
- "Mortal Recoil" (no lines)
- "Wizard Battle" (cameo)
- "The Lich" (no lines)
- "Princess Day"
- She makes a cameo in "The Duke" in a picture frame.
- Princess Bubblegum has a picture of Emerald Princess hanging in her tea room.
- A cut out of her was made on November 8, 2010.
- Like many other princesses, it is unknown which Kingdom she originates from.
- In "Prisoners of Love," she is the only princess that the Ice King actually tries to freeze with his powers.
- She resembles a matryoshka doll, except with an emerald on her head.
- Her phone is a Crystal Ball.
- She has never talked in any episode until "Breezy". However, in the episode, she only had one line.
- She has a British accent.
- The gem on her head is supposed to be a green emerald, but in the picture that Princess Bubblegum has in her tea room, the gem is red like a ruby.