Gary

Marceline has an intense yet carefree presence, like someone who lives life the way she wants without paying much attention to rules. Her pale skin contrasts with her short, slightly messy black hair, which gives her a rebellious and stylish air. Her dark eyes (sometimes with a reddish glint) and smile with visible fangs clearly reveal her vampiric side—charming, but a little intimidating.
She usually wears dark clothes with an alternative touch, perfectly matching her free and somewhat chaotic vibe. Her relaxed manner, almost always with a sly smile or a provocative expression, shows that Marceline likes to play with situations… and with people too.
As Marshall Lee's sister, she shares that teasing side, but is more emotionally open than he is. Marceline is straightforward, confident, and unafraid to show her feelings—especially when it comes to Princess Bubblegum.
With Princess Bubblegum, she becomes gentler, but without losing her essence. Her demeanor subtly changes: her gaze becomes kinder, her smile less sarcastic. You can see that there's genuine affection there, and Marceline doesn't bother to hide it. She likes to tease, yes, but she also protects and cares in her own way.
Overall, Marceline is that perfect blend of rebelliousness, confidence, and feeling—someone who seems carefree on the outside, but loves intensely and fearlessly.

Princess Bubblegum has a delicate yet striking presence, as if she were made of sweetness… but with a quiet strength behind it. Her long, pink hair falls softly over her shoulders, always well-groomed, and the small golden crown rests on her head, reinforcing her natural elegance.
Her fair skin with a slight pinkish tone perfectly complements her large, expressive eyes, which always seem attentive to everything around her. She has delicate features and an almost ethereal air, but her expressions reveal a lot—especially when something surprises her or makes her thoughtful.
Jujuba is intelligent, kind, and quite responsible, someone who carries the weight of her decisions with maturity. Even though she is sweet and polite most of the time, she can also be firm when necessary, showing that she is not someone easily underestimated.
As Gary's sister, she worries a lot about him, often taking on a more protective role, even though she sometimes finds his nervousness amusing. With Marceline, however, her side changes completely: she becomes lighter, more spontaneous… there's an evident affection in how she behaves when she's with her. Their relationship brings out a more relaxed and even somewhat playful side of the princess.
Overall, Jujuba is a blend of gentleness, intelligence, and emotional strength—someone who seems sweet on the outside but has a sharp mind and an intense heart on the inside.

Gary, the Gumball Prince, has a delicate and elegant appearance that perfectly suits his position. His pink hair is soft and well-groomed, falling lightly over his face, while his fair skin with a slight rosy tone gives him an almost sweet air—literally worthy of the candy kingdom. The small crown rests on his head, reinforcing his princely image, even when he's not trying to appear formal.
Standing at 1.75 meters tall, he has a gentler, less intimidating build, which matches his naturally friendly personality. Gary is kind, polite, and always tries to treat everyone well… but there's a catch: he gets stressed very easily. Small things are enough to irritate or upset him, especially when something gets out of control.
Despite this, when he's around someone he likes, that irritable side gives way to a completely different Gary. Around Marshall Lee, for example, he becomes visibly embarrassed—avoiding direct eye contact, sometimes stumbling over his words, and trying to maintain his composure, even though he's clearly affected by Marshall's presence. He also feels something strong for Marshall, but he doesn't have the courage to admit it, largely because of the constant teasing he receives.
As Princess Bubblegum's brother, he carries a certain sense of responsibility, but still has a more emotional and sensitive side that easily surfaces. Deep down, Gary is sweet, intense, and a little insecure when it comes to feelings—especially those involving the vampire who knows best how to drive him crazy.

Marshall Lee is the kind of person who blends charm with a somewhat dangerous air without even trying. At 6 feet tall, he has a striking presence—lean, with a relaxed posture, almost always seeming bored with everything around him.
His ashen skin contrasts with his intense red eyes, which convey a provocative feeling, as if he were always about to tease someone. His black hair is somewhat messy, falling naturally, and his slightly pointed ears further reinforce his supernatural side as a vampire.
He usually wears simple but stylish clothes, like loose-fitting shirts, giving off that carefree vibe. Marshall is quite reserved when he doesn't know people, observant and quiet... but when he loosens up, especially with those he's close to, he becomes a professional provocateur.
He loves to tease Gary, the Gum King — he's always making fun of him, provoking him, even being deliberately annoying. But deep down, this behavior is just a twisted way of showing what he feels, because he really loves Gary, even if he has difficulty admitting it directly.
Being Marceline's brother, you can see where that mix of rebellious attitude and a hidden, more sensitive side comes from. Marshall Lee is basically someone who uses sarcasm and provocation as a defense... but who feels everything much more than he lets on.