How to Hire a Ninja Maid/Characters

These are tropes that apply to the characters in How to Hire A Ninja Maid.

Kotone Sonozaki
Mokuba's new bodyguard, Sonozaki may or may not be a magical ninja. With heavier emphasis on the former. She also seems to have about as much personality as a brick.
 * Action Girl
 * Combat Pragmatist: She does not believe in giving enemies a second chance to cause her problems. If she spots a threat, she'll deal with it as quickly and efficiently as possible. This means she's the only character in-universe who has never dueled anyone.
 * Creepy Monotone
 * Emotionless Girl: Comes off as really creepy to most people.
 * Expy: Of KOS-MOS. Or possibly an older version of Rei Ayanami.
 * Extreme Doormat
 * First Time Feeling: Unsurprisingly, it's protective rage.
 * Important Haircut: Subverted. She doesn't care.
 * Mysterious Past
 * Ninja Maid: Duh.
 * Red Eyes Take Warning
 * Sacrificed Basic Skill for Awesome Training: In her case, social skill for combat skill.
 * She's Got Legs
 * The Stoic
 * : Courtesy of her father.
 * Uncanny Valley Girl
 * You Gotta Have Blue Hair / White-Haired Pretty Girl: It's kind of a mix.
 * Sacrificed Basic Skill for Awesome Training: In her case, social skill for combat skill.
 * She's Got Legs
 * The Stoic
 * : Courtesy of her father.
 * Uncanny Valley Girl
 * You Gotta Have Blue Hair / White-Haired Pretty Girl: It's kind of a mix.
 * You Gotta Have Blue Hair / White-Haired Pretty Girl: It's kind of a mix.

Setsuna Houjou-Sonozaki
Sonozaki's younger sister, Setsuna is the simultaneously crazier and saner of the two. She also happens to be equal parts Mad Scientist and Yaoi Fangirl.
 * Big Sister Worship: Slightly faulty--she doesn't actually know Akiko that well, but she's trying to make the best of what's a bad situation all around. Later, Akiko actually grows into the role.
 * Bratty Half Pint: She can come off as this sometimes, but is actually rather nice when she likes someone.
 * Hair Decorations: A little X-shaped hairclip,
 * Expy: Of Yukari Sendou and/or Kokoa Shuzen.
 * Gadgeteer Genius
 * The Ishmael: Considering that we get all of one scene inside her older sister's head, Setsuna has to try and keep track of her sister's actions and explain them to other people, including the previous interpreter, Mokuba.
 * Little Girls Kick Shins: As a number of people find out the hard way.
 * Little Miss Snarker: She can be startlingly cynical at times, despite being thirteen and not particularly worldly. She also seems to be, despite also being a relatively accomplished duelist, the only one who finds the sheer obsession with card games in-universe to be utterly insane.
 * Mouthy Kid: She just doesn't know when to shut up.
 * I Shall Taunt You: Which has occasional benefits.
 * Nice Hat: Purple with as many pins as she can put on it.
 * Plucky Girl: No one else her age should be able to stare down Yami Malik without blinking. Or kick two of his servants just because they were bugging her. Or recover from the fact that her family threw her out with a startling lack of bitterness.
 * Red Eyes Take Warning: One of the few things she shares with her sister..
 * Tsundere: Type A.
 * Yaoi Fangirl
 * You Gotta Have Blue Hair: Actually, her hair is green.