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Full Name Tess Slater
Current Age 19 (cannot age due to mutations)
Date of Birth September 01
Zodiac Sign Virgo
Gender Female
Species Martian
Location Sector Alpha (Mars)
Align Protagonist
Current Status Alive
Class Middle Class
Main Weapon(s) None
Laser Gun
Element(s) Destruction
Ability/ies Persona Replication
Melee Combat
Vulnerable To Contradictions
Height 5'11"
First Appearance Radioactive
Family and Relations
Tiffany (daughter)
Taron (persona), Vermilion (persona), Grieve (persona)
Latest Appearance Tessellate
The local psychopath, at your service.
Tess, describing herself.

Tess was the main protagonist in the Radioactive series. She originates from the planet Mars, and is part of the Martian race, however it is unknown from where on the planet she comes from. Tess is known for her various personalities, which have all become known and recognised in their own right. Some have even disjointed from her, and lead their own separate lives.

She was rebooted on her birthday, September 01, through the complete release of Tessellate, focusing on the relationship between her and her genetically-created daughter, Tiffany.

A novel is currently being planned focusing on Tess, however it is in very early stages. It is unknown what it will entail at this point, but it is unlikely that it will be posted on the wiki.


Tess originates from the non-fictional planet named Mars, which is the fourth planet from the sun in the solar system. Moments after her birth, Mars begins to plummet time after time and ultimately loses its resources, which leads to the planet being forced to evacuate. The Martians quickly rush to find escape pods which will transport them to the nearest and most secure planet, however when Tess' family finally reach one, there is only space for one of them to leave, forcing them to choose Tess' safety over theirs. 

Tess is placed in the escape pod and manages to escape Mars, just as several explosions from atomic bombs are detonated back on Mars. She rides through space and ages heavily due to the Radiation caused by the bombings, and she suddenly crash lands in a strange environment, coincidentally destroying a diamond dome whilst doing so. She creates a crevice in the dome which allows the remaining fighters in the tournament to escape, creating a huge uproar among the viewers and regulators behind the tournament, also angering Grieve, the master behind the tournament.


Tess' personality is split in various different ways. She has a lot of alternate personalities which all have unique characteristics and traits which makes them differ from her standard self. It is also known that some of her personalities have grown away from her, and become their own individual being, living their own lives. Significant personalities may have their own articles in the future depending on the amount of content available.

You can view information on all her personalities on Tess/Personalities


Tess has a range of abilities. She is very skilled in fighting, and knows many different martial arts. She also has access to a large range of weapons, which she can use whenever she feels need be, however, she does prefer arm-to-arm combat. 


Here is a list of Tess' appearances in projects.


Tess appears as one of the main characters in the game, despite not appearing until the very end of the game's story. Tess explains that she created the radioactive creatures to put Tiffany, her daughter, to the test, to see if she was really worthy of being associated with Tess. After being defeated, Tess admits her intentions behind creating Tiffany, before being interrupted by Kimiko arriving to rescue Tiffany. The two leave, and Tiffany shoots at the building where Tess was, hoping to kill her. 

It is revealed at the end of the chapter that Tess survived the rubble, and was saved by an unknown person. 

Dimensional Destruction




Tess' relationship with Vermilion is very complex. It seems as though the two get along, even being sworn enemies of each other, this is most likely due to the connection they have together, as Vermilion is one of Tess' personas. 





Tess was the first character ever to have a Pacificard made for them. The card comes with the deluxe edition of Radioactive Remastered, however its role is undetermined at this time.


Tess has been very positively received by the community, often being used in various fan works across the community and she was voted as the runner-up to the best Fantendo character of 2015.



  • Tess was the first official Radioactive original character.
  • Tess shares a lot of similarities to the author's own portrayal of himself, also stating that all of Tess' alternate personalities reflect a persona of his as well.
  • Tess was often used as Illusion Works' mascot. 
  • Her natural hair colour was black, but has been dyed to purple/pink.
  • She knows a number of martial arts, including Karate, Aikido, Judo, and Krav Maga.
  • She is right handed.
Solarrion Project

Start a Discussion Discussions about Tess

  • AMA ~ Tess

    35 messages
    • Ever thought about marriage?
    • <b><i>Drebbles wrote:</i></b><br>Ever thought about marriage? Who hasn't? I'd like to be married somed...

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