main image


Real Name: Sandra Yo

Identity/Class: Human mutant, citizen of Krakoa, presumably of Chinese-descent see comments;

Occupation: Unrevealed

Group Membership: None

Affiliations: Banshee (Sean Cassidy), Fauna (Desmond Ochoa-Diaz), Marvel Girl (Jean Grey), Sonos Rex (Robert Wynn), Wolverine (James “Logan” Howlett), Charles Xavier

Enemies: None

Known Relatives: None

Aliases: None

Base of Operations: Krakoa

First Appearance: House of X#1 (July, 2019)

Powers/Abilities: Wrench is a mutant with an as of yet unreleased set of abilities. She did, however, have several psionic-like green butterflies surround her head. As an inhabitant of Krakoa she's able to speak Krakoan and has access to the many Krakoan portals granting her access to the corners of the world and beyond.

Height: Unrevealed, impossible to determine
Weight: Unrevealed, impossible to determine
Eyes: Unrevealed
Hair: Green, presumably dyed


(House of X#1 - BTS) - When Charles Xavier and Magneto established the sovereign mutant island nation of Krakoa, Xavier delivered a telepathic message to the world, welcoming every mutant to live on Krakoa. Wrench was one of the many mutants who accepted.

(House of X#1) - Wrench, Sonos Rex, Fauna and seven other mutants met with senior X-Men Banshee and Jean Grey at the former Xavier's Institute for Higher Learning, now renamed the Graymalkin Habitat. Outfitted in standard X-Men costumes the mutants followed Banshee and Jean through a Krakoan gate granting them access to the new mutant island nation. The new arrivals were welcomed by Wolverine and Charles Xavier.

Comments: Created by Jonathan Hickman and Pepe Larraz.

Wrench's codename implies that she either has sudden violent outbursts or the ability to cause sadness or distress.

Sandra's last name implies that's she's of Chinese descent as Yo is a common last name found among overseas Chinese communities around the world. In fact, "Yo" is the transliteration of several different Chinese surnames. Its meaning varies depending on how it is spelled in Chinese, and which dialect it is pronounced in.

Wrench is one of the many new mutants introduced during the Krakoan age, but one of the few who's been identified. Others include Abeni, Aphelion (Reed Fox), Markos Argyros, Bad Guy (Gabe), Brutha Nature (Jacob Williams), Aura Charles, Paulie DiCosta, Curse, D-Cel (Miranda Manuel), Leonara Eng, Escapade (Shela Sexton), Faceshopper (Soph), Fauna (Desmond Ochoa-Diaz), Fish, Galura (Gabrielle Diwa), Gimmick (Carmen Cruz), Good Arson (Rex Ridley), Harmonize (ZZ Phalen), Jellick, Jersey Devil, Julia, Kafka, Kappa (Megan Ogawa), Kayla, Liana, Christopher O'Leary, Cam Long, Lost (Marinette), Pity Girl (Nora Kuang), Morgan Red, Rosie Rodriguez, Monica Sellers, Sights, Soft Serve, Somnus (Carl Valentino) and Sonos Rex.

Profile by MarvellousLuke

Wrench has no known connections to

Images: (without ads)
House of X#1, p14, pan 2 (main image)

House of X#1 (July, 2019) - Jonathan Hickman (writer), Pepe Larraz (pencils, inks), Jordan D. White, Annalise Bissa (editors)

First Posted: 02/09/2022
Last Updated: 11/12/2023

Any Additions/Corrections? please let me know.

Non-Marvel Copyright info
All other characters mentioned or pictured are ™  and © 1941-2099 Marvel Characters, Inc. All Rights Reserved. If you like this stuff, you should check out the real thing!
Please visit The Marvel Official Site at:

Special Thanks to for hosting the Appendix, Master List, etc.!

Back to Characters