Mark Smith

"Smell you later, Weird-o."

- Mark Smith

Marcus Santiago Jr. "Mark" Smith is a high school student, Saira and Binita's younger brother, Rochelle's crush and classmate, Sid's second best friend, and Carlos' third best friend and classmate. He is a supporting character from Toby and Rochelle: 9th Grade Ninja Twins, and the main protagonist of its spin-off, The Casagrandes. He also happens to be the younger sister of Lori's boyfriend Bobby.

Early Life
Mark was born and raised with his parents in New York City, Michigan. He is attended New York Elementary School.

As seen in "Regular Show: The Movie", Toby first became friends with Howard after finding him funny in Kindergarten. Despite this, in "Don" he seemed to favor Howard's younger sister, Delilah, spending lots of time with her and leaving Howard in his shadow.

As shown in "Maxin' and Relaxin'", he went through a lot of embarrassing moments, such as falling from a high height on stage during a play, and getting a saxophone mouthpiece stuck in his throat. Thanks to his mom however, he managed to survive these situations.

Heavy Bullier
He was first mentioned (but does not appear onscreen) in the episode "Heavy Bullier", in which he constantly bullies Rochelle and humiliates her in front of her peers. When Rochelle's sisters find out about it, they tell her that he's bullying her because he likes her and wants to get her attention. Thinking they might be right, Rochelle goes and kisses him when she tries to confront him, and he responds by giving her a black eye, seemingly proving her sisters wrong.

However, the sisters' statement turns out to be right after all, as he then gives Rochelle an apology letter with his phone number on it, and a steak to heal her eye with.

Extreme Best First Date
He makes his first on-screen appearance in "Extreme Best First Date". In this episode, Rochelle's former classmates tease her about Mark's crush on him, resulting in her giving a speech about how she refuses to even consider him as her boyfriend. Unfortunately, he hears her saying this and was truly hurt by her words. To set things right, her twin brother Toby makes Rochelle go out with Mark on a double date with him and her best friend Karen so she can apologize in person.

Throughout the date, Rochelle gradually finds herself bonding with him, but things get awkward when her teasing classmates show up at the restaurant, and Rochelle, after a failed attempt to sneak out without them noticing, ends up insulting him again. Rochelle promptly apologizes to Mark for her behavior and shares her first real kiss with him.

The next day, when Rochelle is still being teased by her classmates about this, he slaps her in the face and acts as though he doesn't like her, but once her classmates had left the scene with sympathy for Rochelle, he passes her an ice pack with an apology letter, saying he hopes that stopped the teasing, meaning their break up was fake.

Fair Enough to Remember
In "Fair Enough to Remember", his best friend Carlos becomes close friends with Rochelle and begins to spend more time with her than he does with Mark, making him jealous. To get back at him, he starts hanging out with Karen. The four of them went out as friends together and no matter how much he tried, Carlos remained unaware that he was trying to make him jealous. Eventually Rochelle had to break off their friendship to bring them together. Carlos was hurt by this, but Rochelle said they could still be friends if they didn't hang out as much as they used to.

Selfie Improvable
During Rochelle's attempts to her one-up rival Poppy Owens in "Selfie Improvable", Mark calls Rochelle to try to get her support for something he is about to undergo. But Rochelle is so caught up in blind determination that she almost ignores him, although she does call him to invite him to a picnic for a selfie. Later, after Rochelle has arrived at the picnic area, Mark drives over to see her, revealing that he has had his wisdom teeth taken out. Astonished that Mark would drive to see her while still groggy from anesthesia, Rochelle apologizes to him for being selfish and decides to make the most of the time she has with him.

Apartment of Despair
In "Apartment of Despair", Rochelle are visiting Mark's extended family in the home town apartment. Lori, and later Mark's aunt Parineeti, insists on referring to Mark as Rochelle's "boyfriend," which the two vehemently decline. Despite their trip is two days long before home, Rochelle sneaks into her house and spent the night at their apartment without noticing.

Upon arriving at the city, Mark is initially unenthusiastic about the trip, but when Rochelle reveals that she's moving to the Casagrande Apartment after her bedroom is flooded over her house, he is very shocked and almost convince her that she's not going to move out of her house. Mark and Toby brainstorm a way to keep them from moving, including a Dream Boat-styled dinghy date, and one involving one of Rosa's love potions. Later afternoon during noticing Mark's frustration, she forgot that accidentally creates a black hole that sucks in everything from his room and tries to cheer him up by making a small sun over his head, but it turns into a rain cloud. Fed up, Mark decides that if Rochelle's moving in, he is moving out. Climbing out the window and falling into a bed of cacti, Mark walks off in anger.

That night, both of them with Lana rush down to the basement to find the leak and both began arguing about their living arrangement. They are attacked by river lampreys that try to drag them under. Using their work technique from earlier, they defeat the lampreys who burrow a hole and drain the basement. Hop Pop comes down to tell the two that despite it not working out, they are better friends now for being honest with one another.

When Mark is about to leave, Rochelle admits that she likes him. She explains how she didn't want to reveal the secret because it would hurt the family and friends. He shares his first hug with Rochelle, saying he'll miss her.

Mysterious Mayhem
In "Mysterious Mayhem", he says that he may have an idea, pointing out the symbol used to create the portal is something they all have seen before, referring to a small device in Splinter's "do not touch" cabinet.

Back at the construction site, Rochelle tries to figure out how to open the portal with the device. However, she freezes and starts to crack under pressure as her friends and brother make multiple side comments. Mark then offers to open the portal and after holding the device over the wall, it starts glowing. Mark uses the device to create a "M" like symbol on the wall, opening the portal. After they congratulate Mark on his effort, the five of them "cannonball" into the portal and fall under to a mysterious location underground.

Hannah then finds the gang and Mark and explains that they are in a hidden city under California. She then leads them into a laboratory, where they find the "dog-thingy" and a delivery person who had fallen through a portal into the Hidden City shortly before the former creature's capture. They then see a large mutant-like being enter the room, takes the vial of ooze around the dog-thingy's neck and fills it in a large unit filled with mosquitoes. The gang and Hannah all watch in disgust and horror, as well as overhearing the mysterious mutant recall a successful mutation that worked years ago.

Hannah then remarks that they have to rescue the dog-thingy, but the gang don't have any weapons. As Rochelle attempts to do a pep talk, Hannah finds a lever, taking her and the gang to a secret room filled with weapons. Rochelle then finds some glowing mystical weapons, in which he, Rochelle, Toby, and Howard take. Karen refuses the mystic weapon and takes a purple crystal instead. The five gang and Hannah return to the lab, bringing the attention of the mysterious villain.

The villain then introduces (or refers in third person) himself as Baron Draxum and tries to talk the gang into training under him. After Toby comically points out how Draxum is doing the "third person" gig, Rochelle, followed by the others, charge back into battle. After Hannah successfully beats up the two gargoyles and is restrained by Draxum, Mark then throws his Kusari-fundo at the villain, in which the weapon suddenly lights up and sends Mark flying across the room. With the others amazed, Rochelle asks how Mark was able to activate his weapon, which he unwillingly does again as he explains. Rochelle then tries to activate a mystic power within her weapon does, tries to use her sword to attack Draxum, up she ends up creating a portal where Toby is endlessly falling instead of her.

Karen then starts to fight Draxum with her weapon, but Mark accidentally knocks into her, and the two start bouncing around. Karen then notices that the lab is about to explode, as Mark accidentally disrupts the tower's core when he first activates his mystic whip. The tower then explodes and splits around, releasing all the Oozesquitoes and the lab starts crumbling around the group (with a part of the roof falling on top of Draxum just as it starts to collapse). Free from his power-proof cage, the dog-thingy teleports out, over to the gang and Hannah, and takes the five out of Draxum's lab. Mark then uses the device to open a portal back to New York, but it is then smashed and destroyed as the group returns to the construction site.

Personality
Mark's first appearances initially depicted him as a very surly, tough and mean-spirited boy who sometimes came off as unkind and somewhat cruel, though later appearances - mostly following the episode "Friended!" - depict him as a nice, good-hearted, and well-meaning person who is kind to everyone and has a knack for planning, just like Rochelle, his first crush, whom he deeply cares for and loves to crack up jokes and is generally more optimistic than his siblings and cousins; in Los Angeles, California, Mark has made another best friends in Sid Yang and Carlos, and "An Udder Mess" shows he doesn't want to disappoint his two best friends, wanting the best for them. In addition to Carlos and Sid, his closest friends, he has also befriended a group of city teenagers by the events of "City Slickers", along with Laird following "The Two of Clubs".

Physical Appearance
He is an African-American boy. He has vitiligo circle-like markings on his shoulders and thighs, blue eyes, curly light black hair with vitiligo brown highlights, a small gap on the right side of his upper jaw, and freckles on his cheeks.

When he was young, his hair is naturally light black and has freckles on his upper nose and cheeks.

Clothing
In S3 original appearance, he wears a orange hooded unzipped jacket, dark pair of jeans, a white tank top, white sneakers and spilt neon pink/blue striped mid calf-length socks.

In S4, he still wearing the same jeans, but he now wore a light blue hooded open jacket with neon pink and blue lighting bolt designs on it; underneath a dark gray almost elbow-length shirt with an orange signature name "Mark" on the center, white sneakers with neon pink and blue lighting bolt designs on it, and white mid calf-length socks. While he ties his jacket around his waist during skateboarding, he wore an orange elbow/knee pads that drawing an emojis on it with black fingerless wrapping upon the elbows and light blue helmet.

For night attire, he wore a bright yellow t-shirt with neon pink and blue lighting bolts on it, navy teal pants with yellow-orange designs, and white & gray socks.

When he was young, he wore a yellow sweatshirt, initially blue jeans-shorts, and black sandals.