For other forms of Seina, see Seina (disambiguation).
Seina Yuki
Personal data
Age 15 (Season 1; Not seen)
16 (Season 2)
17 (Season 3-4)
Gender Female
Species Human
Deck "Gem-Knight"
Occupation Student of Duel Academy
Student of an All Girls School (formerly)
Morality Good
Living status Alive
Additional info
Place of origin Domino City, Japan
Residence Toyko, Japan (currently)
Domino City, Japan (formerly)
Date of birth 24 October 2001
Star Sign Virgo
Ethnicity Japanese
Nationality Japanese
Hair color Light brown
Eye color Green
Skin color Average
Height 5'2" (Season 2)
Love interest Kai Reid
Relatives Ryuji Yuki (father)
Asami Saito (mother, deceased)
Maiko Yuki (stepmother)
Jaden Yuki (paternal half-brother)
Partner "Gem-Merchant"
Affiliation Yuki family
Powers and skills
Powers Duel Spirit communication
Skills Dueling proficiency
Equipment Duel Disk
Production notes
Created by PrincessAnime08
Appearances Chaos of The Light
My brother may not be smart in the learning area, but he excels in the dueling area!
Seina Yuki

Seina Yuki is the daughter of Ryuji Yuki and Asami Saito, stepdaughter of Maiko Yuki, and the younger paternal half-sister of Jaden Yuki. She is a first-year Obelisk Blue student of Duel Academy and a former student of an All-Girls School in Tokyo. Seina duels with a "Gem-Knight" deck with her Duel Spirit being "Gem-Merchant".

Physical description

Seina is very slim with a petite build; she has she has long light brown hair and green eyes. She wears the normal Obelisk Blue girl uniform, but with a pair of shorts underneath.



  • Duel Spirit communication: Seina has the power to see and talk to Duel Spirits. 


  • Dueling proficiency: Seina is a skilled duelist, able to work with anything she has on hand.
  • Adaptability: Seina able to quickly adapt and change her current plan if needs are.
  • Normal level intelligence: Seina is smart in her own way, and does what she can to turn in her homework on time.


  • Not willing to get close: Recently, Seina has begun to distance herself from her brother, reasons unknown to him and everyone else.


  • Academy-issued Duel disk



Seina runs a Gem-Knight Deck. Like Jaden, they involve the usage of their own version of Polymerization, Gem-Knight Fusion, to create stronger monsters.


  • Seina was originally named Reina
Season of Chaos series
Caline Alvarez
Carson Alexander