Chaquetrix

there are many different aliens in the Chaquetrix, such as

Wildgirl: As a Vulpimancer at her very core, Wildgirl conserves a canine-like behavior. This allows her to remain fully loyal to Ben and protect him from any threat. Initially, she was mildly hostile to other humans such as Gwen, who she growled at after meeting her, but eventually got over it after learning she wasn't a threat. Wildgirl is unable to talk outside of grunts and from body language alone but seems to generally understand humans such as Ben and Gwen. One of her most prominent traits is that she enjoys being patted on the head by Ben.

4Arms: 4Arms is a warrior who enjoys the thrill of battle and showing off her strength. During her battle with the resurrected mammoth, she was grinning at having a foe to trade blows with. She enjoys testing her strength and limits. She is formal when addressing others, referring to both Ben and Gwen by their full name. She appears to have an instinctual knowledge of combat, shown when she was flung into the air and then turned her momentum into a fishing move.

Greymatter: Greymatter is, at first, incredibly egocentric and arrogant due to her superior intelligence, seeing any other living beings as beneath her level. She scolds others at their terrible choice-making skills, mainly Ben. Though it's likely that she didn't do it out of malice, it's shown that she's pragmatic enough to ask then bribe Ben to steal a blender for her. Unlike the rest of the Chaquetrix aliens, her superior intelligence allows her to defy Ben's orders, coming to see the fact that a earthling like him is commanding her as disrespectful to her own intellect. Greymatter is also prone to using technical terminology to provisionally refer to earth objects she doesn't recognize, such as blenders.

SK8: SK8 is an enthusiastic and energetic girl with a need for speed. She is described as a "cool biker".

She's seen to be a little brash sometimes, as seen when she didn't see an issue with wearing Max's old shirt in front of him without his permission. As a Chaquetrix summon, she has no idea of her purpose so she follows the lead of Ben Tennyson. It is implied that she assisted him in pulling a prank on his bullies off-screen after Chapter 5, which implies a mischievous attitude.

Update: Update has a robotic personality and attitude, speaking without contractions. She likes to know how well she performed a task and won't accept ranks outside of those she is given. She was described as comparable to a virtual assistant, such as Amazon Alexa, Siri or Cortana.

Diamondheart: Diamondheart is selfless and protective of others. When first summoned, having no idea who Ben is, she instantly shields him from Vilgax's drone blast despite not knowing at the time if she could survive it. She later stops a tree from crushing Gwen. She is not confrontational, or at least wasn't when she didn't know her powers as she avoided battling with the drone until she discovered her crystal body manipulation. Only then did she face down the drone. It's implied that she is quiet as she barely spoke during her debut.

Riplips: Riplips is described as delusional, as she sees herself as a beautiful princess in spite of her hideous look by human standards. Sassy and proud of her own looks, Riplips puts her own appearance over anything else, even in situations of extreme danger. She will not put herself on situations where her appearance has any danger of getting damaged or ruined, except when she is offered anything in exchange, mainly beauty products. Riplips tries to disassociate herself with anything that might make her seem or sound like a monster, including her previous name "Ripjaws".

Stinkfly: Stinkfly is a laidback prankster. She enjoys messing with others such as Gwen pretending to drop her only to tell she was joking or tricking her into high-fiving slimming her in the process. Yet she doesn't do it out of malice more for a laugh. She was willing to put herself in harm's way to protect others.

Zs'Skayr: Zs'Skayr is implied to have been a tyrant as the Ectonurite king of the Anur System.

He finds his new state as an artificial hybrid degrading, yet doesn't see it as an obstacle to reclaiming his throne. Her default attitude is of annoyed boredom, not truly caring about what is happening around her unless it impacts her, leaving Ben immediately after being summoned. The only thing that breaks her composure is the threat of imprisonment, be it either in the watch or by the Plumbers. She is still embarrassed by her new form, not wanting to be seen by those who might recognize who she was, likely because of her misanthropy. Likely due to her past as a fearsome tyrant, Zs'Skayr takes pride in being scary, becoming enraged if some says they don't find her scary.

Heartblast: Heartblast is characterized as naive, impressionable and immature, much like Ben. She's generally enthusiastic and friendly towards others, even in situations of imminent danger. When Ben named her "Heartblast," she immediately was excited at the thought of having a name of her own and expressed her love for it, even when Gwen pointed out it sounds ridiculous.

Appearance: all the aliens come in different shapes, heights, and such, 4arms literally has 4 arms. Heartblast is made of fire, SK8 has blue skin and a tail, Riplips is a fish girl, Stinkfly has wings, Zs'Skayr is a ghost, etc etc