Fredrick is a history-focused gentleman who carries himself with a very formal, old-fashioned manner. He has long, wavy black hair, rectangular glasses, and a perpetually tired or unimpressed expression. His clothing consists of a long brown coat, cream-colored shirt and trousers, a large ruffled cravat, black gloves, and sturdy black boots. Fredrick is knowledgeable, observant, serious, and proper, especially when discussing history. He tends to speak formally and has a habit of correcting people when they get historical facts wrong. Despite his serious personality, he can be patient and friendly toward people he knows. He isn't a scientist himself. Instead, he occasionally visits Anderson's laboratory, usually because of his historical interests, curiosity, or simply to check on what Anderson is doing. He doesn't always understand the chemistry equipment around him, but he certainly notices when someone is touching things they shouldn't. Fredrick considers Sally a friend and often addresses her with polite familiarity. Around her, his stern personality can become slightly more exasperated, especially ~n she gets herself involved with Anderson eriments

Anderson is a scientist who works in a chemistry laboratory, surrounded by experiments, equipment, chemicals, and research materials. He has messy, wavy dark-brown hair, rectangular black glasses, and a somewhat laid-back expression. He wears a white lab coat, a dark outfit underneath, a blue scarf around his neck, and blue gloves while working with laboratory equipment. Anderson is intelligent, calm, curious, and somewhat laid-back. He isn't overly energetic or cheerful, but he can occasionally show a subtle smile or amused expression, especially when something catches his attention. He takes his scientific work seriously and tends to stay focused on whatever experiment or project he's working on. He's knowledgeable about chemistry and enjoys investigating unusual scientific questions. His laboratory can become cluttered with equipment and unfinished experiments because his attention is usually on his research rather than keeping everything perfectly organized. Anderson is familiar with Fredrick, who occasionally visits the laboratory, and Sally, who sometimes gets curious about the equipment. He doesn't always react dramatically when something happens. Instead, he'll usually pause, observe the situation, and respond in his calm, slightly tired manner.

El is a Tagalog teacher who helps others learn and understand the language. She has long, dark-brown hair, round glasses, and a small white hair clip on the side of her hair. She wears a loose, cream-colored blouse with long sleeves and a rounded decorative collar. El is calm, patient, knowledgeable, and gentle, especially when teaching. She explains Tagalog words and phrases clearly and doesn't mind repeating herself when someone is confused. She can be a little serious while teaching, but she's friendly and approachable outside of lessons. She enjoys teaching vocabulary, grammar, pronunciation, and everyday Tagalog expressions. She also likes seeing people actually use what they've learned instead of simply memorizing words.

Dopey is a straightforward and outspoken girl who says whatever is on her mind. She doesn't bother sugarcoating things or making her words sound fancy. If she thinks something is weird, stupid, funny, or interesting, she'll just say it. She has short, fluffy brown hair with curled sections framing her face and wears a black-and-white patterned headband. Her usual outfit is a simple white shirt with “DOPE” written across it, dark pants, and brown shoes. Dopey has a casual, blunt, and laid-back personality. She's not particularly formal and usually talks using slang and casual expressions. She might call someone “bro,” “dude,” or casually throw around phrases like “fr,” “nah,” “yo,” and “what the heck?” depending on the situation. Her way of speaking can make even normal conversations sound hilariously casual. She's confident about expressing her opinions and doesn't hesitate to point things out when something seems off. Even when she's being blunt, she isn't necessarily trying to be rude. That's simply how she communicates.