|Relatives||Arthur Gaz (father) (presumed)|
|Light Novel, debut||Volume 1|
|Manga, debut||Chapter 0|
|Anime, debut||Episode 1|
|Japanese Voice||Chika Anzai|
|English Voice||Kira Vincent Davis|
Chaika Trabant (Gaz) is a 14 years old sorceress who runs into Toru Acura and picks him up as a travelling companion, along with his sister Akari Acura. Chaika is a mage who carries a giant coffin around with her. She excels in high-precision spells and is also sensitive to the thickness of her eyebrows.
She has long white hair that reaches down to her waist and large purple eyes. She wears a slightly frilly white dress with a black skirt with puffed sleeves and a frilled white headband. She has camouflage sleepwear that she made herself which she used during her travels before she met the Acura siblings. She also has a scar on her neck that looks like her head was chopped off. Also on the back if her neck she has what looks like a magic symbol. Her most distinctive feature is her thick black eyebrows.
Chaika Gaz is a well-mannered girl who strongly dislikes the use of violence, often opposing Toru with no alternative solutions. However, she is rather gullible and naive, causing her to be oblivious to dangers. This is worsened by her bad sense of direction.
Despite speaking in incomplete and disjointed sentences, Chaika is fluent in Laake, the language of the Gaz Empire.
Chaika appears to suffer from memory loss but remains devoted to her quest of collecting the remains of her father.
In the second season, she is shown to be more emotional and becomes even more determined to achieve her objective, at one time abandoning the Acura siblings.
Her manner of speech somewhat improves but the use of Laake remains scarce.
While travelling Delsorant to take one of Arthur Gaz's remains being held by Roberto Abarth, she gets lost in the mountains where she meets Toru Acura. Chaika initially tries to get away from him but was unsuccessful and attempts to accuse the Toru as a bandit. As they are clearing up their misunderstanding, they are attacked by the unicorn Feila. They attempt to escape but Toru suffers arm injuries from a fall off a cliff, and givs up, waiting to die. Chaika manages convince him otherwise and they agree to fight the unicorn in order to survive. Chaika activates her spell while Toru engages the unicorn. Chaika delivered the fatal blow with her spell, "The Ripper", which bifurcates the unicorn down the middle. After the fight, they introduce themselves to each other and Chaika proceedes to buy Toru lunch in return for helping her out of the forest.
Toru's lunch is quickly interrupted by his sister, Akari. After a commotion, Chaika hires Toru and Akari to help her gather the scattered remains of her father, the overthrown emperor Arthur Gaz. This explains why she always travels with a coffin — to store her father's remains.
However, Chaika is pursued by the Post-War Kleeman Agency's Gillette Corps, who has been tasked with capturing Chaika. The Gillette Corps later discovers that there are multiple Chaikas, confusing them and forcing them to conduct more research. they are unable to find much information as little about Arthur Gaz was recorded in books.
In the second season, Chaika learns that Arthur Gaz actually has no daughter of his own. Rather, "Chaika" is one of the many orphaned girls (caused by the war) who have been brainwashed into thinking that they are Chaika Trabant, Arthur Gaz's "daughter". All of them have the sole objective of gathering his remains so that Arthur Gaz can reincarnate, who intentionally died so that he can "experience mortality".
While fighting Arthur Gaz, Chaika Trabant uses all of her memories to power Niva Lada. She loses all of her memories and later reawakens to live a life with Toru, where she seems to have recovered all normal speech functions and uses phrases like arigatō ("Thank you") instead of kansha ("Grateful").
Being a wizard, she is able to cast spells. She is also able to drive their mechanical carriage the "Svetlana".
- The Ripper - Magic slashes.
- (Fly, Blade! The Ripper!)
- The Burner - Explosive fire.
- The Sucker - Sucks sound.
- The Locator - Locates objects with magic sonar.
- (Come, Resounding Perception! The Locator!)
- The Breaker - Breaks through magic shields.
- The Blinder - Creates a blinding light.
- (Exploding light. Go, The Blinder!)
- The Boiler - Boils target.
- The Intruder - Poisons the air or target.
- The anime version causes Fredrica to revert to her dragoon form.
- The Commander - Interference Magic. Nullifies all magic applied on target.
- The Silencer - Nullifies the sound caused on target (like a mute-effect).
- The Floater - Allows user and target to float in the water and in the air. 
- The Slugger - Strikes and crushes the target.
- (Come, to strike and crush! The Slugger!)
- The Overwarming
- The Heavy Wind
- The Buster
- The Annihilator - Large Beam.
- The Meraviglios - Larger large beam.
- Coffin - She carries a coffin. It holds her Gundo Sniper Rifle among other things.
- Gundo - Her Gundo lets her cast high-precision spells. It can be disassembled into smaller components for storage in the coffin.
- Her coffin in the light novels and the manga has a cross but the anime changed it to diamond shapes in place of the arms.
- Her given name comes from a car made by the Russian automaker GAZ.
- Chaika means gull in some Slavic languages.
- Her last name comes from an East German car.
- Trabant is Slavic for "escort" and "guide".
- It is also the name given to 16th century military bodyguards.