My headcannons for CSS characters...

NOTE: These headcannons may be the ones you may disagree with, so I want everyone to remain calm, okay?

Headcannons:

Casper:

• His parents were exhiled from the Underworld for raising their children to be friendly/being "forbiddenly" friendly role models (Casper and Carly, my fan character/Casper's little sister) while Carly has been sent to Casper's grandparents' house to look after her while Casper has his uncles to look after him
• He (as mentioned above) has a little sister named Carly. While his grandmother, Grandma Smoochy, visits his uncles' house, his grandpa stays at home to look after Carly
• His nationality is Irish, although he's a ghost
• He started befriending Jimmy when he was in kindergarten. While in bed, Jimmy has trouble sleeping because it was his first time sleeping without a nightlight, then, Casper flew by the window and saw Jimmy staying awake, so he went into the room and tries to find a way to help Jimmy sleep. Then, Casper had found a way to help him sleep - by reading a children's creature story. From that night, Jimmy and Casper became friends

Ra:

• Ra's ancestors were actually rulers of Egypt, but what he did not know is that one of them was not a ruler. Instead, that ancestor was a servant of a pharaoh and a really reliable one too. No matter the weather and no matter how risky, he can do anything for the pharaoh. The reason why Ra didn't know is because Ra may be loyal to his friends (but not always), he can also be proud of his royalty and it would break his pride if he knew about that his ancestor was a servant
• Ra does have hair (as mentioned in season 1), but it was wrapped underneath the bandages to secure the rest of his bandages. When he reaches 2,507 years old (that's 18 years old in mummy years), he'll get a haircut and probably reveal his hair, but he has to hide his hair otherwise his head and body will turn into dust if the bandages were unwrapped for too long
• He has a group of mummified friends back in Egypt, but since his friends' families cannot afford enough money to enrol them to Scare School like Ra's parents, he has to leave them behind and get used to making new friends, which Ra is okay with

Mantha:

• Mantha has a step father named Arthur. He is an accountant by day but he also has a night shift as scaring people away from his family graveyard house
• Her biological father broke up with her mother when Mantha was 107 years old (that's 7 years old in zombie years) because her mother hates her biological husband's job because he serves "drunken morons" and that he is always careless, which explains Mantha having a chilled side, which leads to...
• ....Mantha, like alot of people, had different sides - smart, chilled/rebellious, crazy (which she rarely shows), caring (like a parental figure) and strict
• First line of her ancestors were Haitian (40% ancestors), mainly because Haiti is where zombies originated from; the second line were Russian (40% ancestors) and third line Vietnamese (20% ancestors), so Mantha might be a mixed-race zombie, despite both her parents are Haitian-Russian (plus I love to picture Mantha as a mixed-race character, with a European, Caribbean and Asian nationalities)
• Mantha got sent to Scare School to make zombies scarier than before, but the main reason why she got sent is because her limbs keep falling off ("...and I gotta work on that (arm)" - Mantha)
• When she graduates from Scare School and college, Mantha will become a scientist and gets married to Frankie
• Mantha suffers coulrophobia. When she was about 4 (104 years old in human years) while she and her family went to the Underworld fun fair, they came to see the circus. When a bunch of clowns came out of the curtains and running around in circles near the audience in the ring, Mantha was in the front with her family. As she witnesses, she felt scared and nearly cried during the clown act due to the clown makeup. Another time, she was 6 years when her older siblings hold a horror movie night. Mantha was too young during that time. Her older siblings watched a horror movie with clowns (a reference of IT) around 10:30pm and Mantha was not tired yet, but she crept to find her siblings to say goodnight, but as she went to the living room; where her siblings watch the movie - she saw everything from the movie and she began to cry as she ran to her parents' room to sleep with them. From that time, one peek at anything to do with clowns, Mantha will go squeamish or sweat in fear

Thatch:

• Thatch's parents are not strict nor evil. They just want Thatch to be the best student at Scare School, like his older siblings
• Thatch did not burn in the sun, because sunlight does not originally harm vampires
• Thatch has a big family with 4 older siblings and 4 younger siblings. Sound stressful but his older siblings help his parents look after younger siblings and younger cousins
• What Thatch knows is that he is Romanian and is proud of being one. However, during the Creature World Week (a week in the Underworld when students celebrate their own nationalities and creature race), Thatch discovered that his first line of ancestors were actually Japanese as half of them were soldiers of the Edo era and the rest of his ancestors were Romanian. How he had discovered is that he found an ancient Japanese soldier armor when he found and went to the hidden storage room
• When he grew up and graduated college, he'll become a detective after being inspired from crime shows
• Thatch first met Slither and Mosshead while they were in kindergarten. From that time, they became childhood friends. Then, he first met Dummy Girl during her first year at Scare School.
• Thatch was actually one of the few students who were lucky to learn at Scare School when they were in grade 6 (just a year before it was denied), that one-year grade of Scare School was actually the last grade of junior middle school ranking before the entire thing got scrapped due to early signs of stress from students; so when the new students arrive, they start their year at Scare School in grade 7 instead. This explains Thatch being held back and graduated with Casper

[SECOND PART WILL BE IN PROCESS. PLEASE STAND BY UNTIL LINK IS PROVIDED]