Carnelian

Carnelian (カルネリアン, Karunerian) is the fusion Gem between Copal and Cherry.

Appearance
She is very tall, being a fusion. Carnelian has pale red skin, four red eyes and also short brushed-back orange hair with bangs that sometimes cover the left side of her face. Also, she has four arms. Copal's gemstone is located on her chest, while Cherry's is on the palm of her right hand.

Carnelian wears silver pants a short-sleeved silver shirt (coming from Copal) with pointy red shoulder protectors appearing only on her upper set of arms. Around her waist, she also has a crimson skirt (coming from Cherry), and red boots.

Personality
As the fusion of Copal and Cherry, Carnelian's personality is like a mix between the personalities of the two of them. She is very cheery and enthusiastic, while still paying attention to other people and maintaining the image of a calm person. She can be quite snarky at times and enjoys teasing her friends; because of Copal's feelings towards Petalite, she is sometimes picked on by Carnelian, but with no malice.

Like Cherry, Carnelian's main objective is to please other people, and she highly enjoys entertaining them, with jokes, for example. She is willing to go to great lenghts to satisfy requests and tends to take things literally, no matter how absurd they sound, probably because of her happy-go-lucky and imaginative demeanor. Also similar to Cherry, Carnelian never seems to get mad or upset, and has quite a naive and innocent outlook on everything. Because of her immense desire to be in the service of others, Carnelian doesn't mind "not existing" if she feels she is no longer needed, and thus, Copal and Cherry can freely unfuse at any time they want, especially if Carnelian is told "that will be all" followed by hand claps.

Copal & Pearl (Cherry)
Copal and Cherry are the Gems who make Carnelian through fusion. Carnelian is aware of that, and whenever she feels she is no longer needed, the two of them immediately unfuse.

Petalite
Because of Copal's distaste for Petalite, typically when Carnelian is fused, she will make at least one joke revolving around Petalite and tease her. Petalite dislikes this and also has ill will towards Carnelian, for being a fusion, and mainly, because of jealousy that Copal is spending time with someone else other than her.

Scythia
Carnelian and Scythia have a really good relationship, mainly because of Scythia's admiration and interest in fusions (in her words, "giant women"). As soon as Carnelian first appeared, Scythia immediately greeted her; Carnelian replied by telling Scythia she could ask her anything, and she would do it. Scythia then asked her to tell a joke, to which she obeyed by telling a pun about Topazes; even though Scythia did not understand the joke, she laughed anyway, and after having it explained to her, laughed even more.