Chelsea Blackett
Chelsea blackett
 Kanji/Kana チェルシ ブラケット
 Rōmaji Cherushi Buraketto
 Also Known As Chelsea-san (by Ichika)
Personal Info
 Gender Female
 Age 18
 Nationality British
 Occupation Alcott Family's maid
 Academic Standing
 Infinite Stratos (IS) None
 Status Alive
 Appears in Light Novel and Anime
 Light Novel Debut Volume 4, Chapter 1
 Manga Debut Chapter 0
 Anime Debut Season 2, Episode 1
 Japanese Voice Mai Gotou
 English Voice
 Other Voice(s)

Chelsea Blackett (チェルシ ブラケット, Cherushi Buraketto) is the personal maid and childhood friend of Cecilia Alcott.


Chelsea is slender young woman with dark red hair. She dresses in typical maid fashion but with a wide leather belt wrapped around her waist. She is described by Ichika as a very beautiful girl for her age (which makes Cecilia jealous).


Chelsea is a loyal maid who respects her mistress, Cecilia Alcott. However, in the novel she is shown to have a more teasing personality and that she likes to poke fun at matters that are embarrassing to Cecilia, most of which relate to Ichika. This, combined with her sharp mind, makes Cecilia a very effective victim of her mischief.

She seems to also have a slight flirtatious streak in her, as seen during her conversation with Ichika in Volume 4 Chapter 1.


  • Cecilia Alcott - She has a friendly and generally respectful attitude towards her master. She enjoys teasing Cecilia when it comes to Ichika.
  • Ichika Orimura - She first meets him after Cecilia's return to Japan. It is not known whether she has any genuine feelings towards him, though she is very polite towards him. For his part, Ichika is somewhat shy in her presence (which confuses Cecilia and makes her think that he likes older women).

Infinite Stratos & Abilities Edit

Chelsea seem to be well trained in fencing, as Cecilia went as far as to strip herself just to have better chance against Chelsea.

History Edit

Currently, nothing is known about her history except that she's a maid of the Alcott family, and that she was a childhood friend to Cecilia.

Plot SynopsisEdit

She appears in the anime dropping Cecilia off at school at the end of the summer break.


Quotes will be updated when available.


  • In Volume 8 of the Light Novel, Cecilia's vision of Ichika in her ideal dream world appears to be partially based off of Chelsea's character. This Ichika is Cecilia's childhood friend and butler, and he tends to tease Cecilia just like Chelsea does in real life.
Infinite Stratos Characters
IS Academy
1st Year
Class 1-1 Ichika OrimuraHouki ShinononoCecilia AlcottCharlotte DunoisLaura BodewigHonne NohotokeKiyoka AikawaShizune TakatsukiSayuka YorutakeYuzu Tanimoto
Class 1-2 Lingyin Huang
Class 1-4 Kanzashi Sarashiki
Others Tina Hamilton
2nd Year Tatenashi SarashikiKaoruko MayuzumiForte SapphireSara Welkin
3rd Year Utsuho NohotokeDaryl Cayce
In-game Character Luanyin HuangVishnu Isa GalaxyRorentsuine Laurent di FillneyFaniel CometO'Neil CometVelvet HellCurrier LuccukchefkaGriffin Redram
Staff Chifuyu OrimuraMaya YamadaJuuzou KutsuwagiEdwards Franchee
IS Pilots
U.S. Army Natasha FairsIris CallingLeader
Phantom Task Squall MeuselMAutumnRain MeuselForte Sapphire
Other Characters
Notable Tabane ShinononoChloe Chronicle
Civilians Dan GotandaRan GotandaRen GotandaGen GotandaKazuma MitarashiYukikoRyuuin ShinononoNagisako MayuzumiChelsea BlackettLei Lei Yang
Kuromochi Machinery Development Hikaruno Kagaribi
Schwarzer Hase Laura BodewigClarissa Harfouch