Soulwester.

It's better to call characters not characters but toons (tun, toon, toonov, etc.)

The World of Dandy Gardenview

You can also call toons cartoons
There are many regular non-event toons

There are 3 holidays and 12 characters (toons/mains)
New Year's event
Easter event
Halloween event

When these holidays end, the toons of these events go away and return the following year (for the next holiday/event)

Each event includes 4 characters (tuna)
New Year's event - Rudy, Ginger, Bobette, Coal.
Easter event Bessie, Cocoa, Flight, Eggson.
Halloween event - Gordy, Eclipse, Soulwester, Rebecca.

Female Connie
Soulwester's younger sister
Connie is a light blue ghost with long hair a shade bluer than her body, a white visor, and a white shirt with black buttons, and has a ghostly tail instead of legs.

She has a rather cold personality. She doesn't show much emotion when talking to others, but despite this, she's not malicious and cares for her friends. Connie is described as a "charismatic, slightly arrogant ghost with a habit of lying about her accomplishments."

Connie is not a Halloween character, but you can consider her as such, but still, she is not like the Halloween characters who always return only once a year when Halloween is celebrated.
and also, initially Connie was called Bulinski, but Connie changed this name and asks (forces) everyone not to call her that.
Also, since Connie is a ghost, she can become transparent at any moment and do anything (eavesdrop on someone, possess someone)

Male Soulwester
Connie's older brother
Soulwester is a knight in dark armor. His head is hidden beneath a massive, dark-gray helmet, the top of which is adorned with wide, rectangular slits. The face of the helmet is completely covered, and instead of the usual eyes, two bright white semicircles curved downwards are visible inside. The entire space beneath the visor is completely black, making the eyes appear to be the only feature of his face.

Attached to the back of his helmet is a long, light turquoise fabric ponytail (almost like hair), pulled back slightly, contrasting with his dark armor. His arms and legs are also covered in plain armor; his hands and forearms glow the same turquoise, creating a soft glow. His legs are covered in tall, simple boots, crafted in the same dark color scheme. Overall, his appearance is built on a combination of black and gray metal with turquoise accents, devoid of unnecessary embellishments or details.

He's also considered a Halloween character, meaning he only appears every other Halloween.

He always considers himself a knight, always protects everyone, etc.
They also say that he is the oldest of all