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Let there be light!
~ Doctor Light.
No point in being afraid of the dark, not when I know there's so much worse out there.
~ Doctor Light.
Everything that's happened. Everything he did. And I still use his damn name?
~ Prime Earth Doctor Light.

Doctor Light (real name Kimiyo Hoshi) is a fictional character and superheroine in the DC Comics and Universe and member of the Justice League.

She is an astronomer who received powers from the Monitor, which allowed her to manipulate light via vega energy. Though not the villainous Arthur Light (also known as Doctor Light), Kimiyo has crossed paths with Light, and has fought him. In Prime Earth, Kimiyo was married to Arthur Light and had children with him, but she later divorced him once he became a villain. She is a member of the Justice League, and has been a member of the Outsiders, Doom Patrol, Justice League Europe, and Justice League Task Force.

She was created by Marv Wolfman and George Pérez, and first appeared in Crisis on Infinite Earths #4 on July of 1985.


New Earth

Dr. Kimiyo Hoshi was an astronomer and became a hero during the Crisis when the all-powerful Monitor zapped Dr. Hoshi with otherworldly energy. Her new power allowed her to control and absorb a variation of different light energy. After the Crisis Hoshi dawned a costume and joined the Justice League calling herself Doctor Light and even became the team leader of the European branch. Doctor Light was arrogant and left many of her teammates with a cold feeling about her.

She possessed most of the same powers as the original villainous Doctor Light, but she used her powers to establish herself as a hero in her own headstrong way. Doctor Light was also a single mother with two young children and was only semi-active in the superhero business, yet she served with both the Outsiders and the Doom Patrol. Although she is no longer a member of either team, Doctor Light remains active as a part-time adventurer.

Prime Earth

On Prime Earth, Kimiyo was married to Arthur Light, and had children with him before he became a supervillain. Afterward, Kimiyo decided to become a superheroine named Doctor Light, and joined the Justice League.

Other Media

Animated Films

Justice League: Gods and Monsters

Kimiyo Hoshi GM.jpg

Doctor Light appeared as Kimiyo Hoshi in the animated film Justice League: Gods and Monsters. She does not have her light powers but is a scientist involved in the Fair Play Program that was meant to stop the Justice League in case they were a global threat. After some scientists were mysteriously murdered, Dr Hoshi met with the other members but was ambushed and killed by the Metal Men.

She was voiced by Lauren Tom, who also voiced the character in Justice League, and also voiced Kuki Sanban in Codename Kids Next Door, Jinx and Gizmo in Teen Titans and Teen Titans Go!, Jessica in Scooby-Doo! Camp Scare, Amy Wong in Futurama.

Television History

Justice League

Doctor Light DCAU.png

Doctor Light appeared in a few episodes of Justice League. One of her significant roles was when she and the Justice League battled the third incarnation of the Royal Flush Gang. Doctor Light battled the Queen of Spades and managed to dodge the Queen's scepter blows by zapping her scepter. Doctor Light then charged the scepter with light energy and caused it to explode knocking the Queen out defeating her. Doctor Light later appeared with Steel and Ice to stop Lex Luthor's group of villains from pulling off a robbery and Doctor Light used her powers to find them.

DC Super Hero Girls

Doctor Light SHG.jpg

Doctor Light appears in the web series DC Super Hero Girls. She is seen as a background student at Super Hero High.

The Flash

Doctor Light TF.jpg

Doctor Light appeared in the second season of The Flash, a tv show part of the CW's Arrowverse, and was portrayed by Malese Jow in season two, and Emmie Nagata in season six. In the series, she was a meta-human assassin who worked for Black Hole, who assigned her to eliminate anyone who knew of the existence of meta-humans.

Justice League Action

Doctor Light appears in Justice League, having a non-speaking role in the episode "Party Animal".



  • She is potentially one of the most powerful superheroines in the DC universe, but hasn't tapped into the heightened levels of her powers.


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Theatrical Movies
Justice League: Justice League (Superman | Batman | Wonder Woman | The Flash | Cyborg | Aquaman) | Alfred Pennyworth | James Gordon | Mera | Lois Lane | Hippolyta | Zeus | Artemis | Green Lantern Corps
Zack Snyder's Justice League: Justice League (Superman | Batman | Wonder Woman | The Flash | Cyborg | Aquaman) | Alfred Pennyworth | James Gordon | Mera | Lois Lane | Hippolyta | Nuidis Vulko | Martian Manhunter | Zeus | Artemis | Green Lantern Corps

Direct-to-video Movies
Justice League: The Flashpoint Paradox: The Flash | Batman | Thomas Wayne | Cyborg | Kal-El | Cole Cash | Godiva | Steve Trevor | Lois Lane | Etrigan | S.H.A.Z.A.M. | Samuel Lane
Justice League: War: Justice League (Batman, Superman, Green Lantern, Wonder Woman, Shazam, & Cyborg) | Steve Trevor | Freddy Freeman |Sarah Charles | Thomas Morrow | Silas Stone
Justice League: Throne of Atlantis: Aquaman: | Atlanna | Mera | Justice League (Batman, Cyborg, The Flash, Green Lantern, Shazam, Superman, & Wonder Woman) | Steve Trevor | Lois Lane
Justice League vs. Teen Titans: Teen Titans (Raven, Robin, Starfire, Blue Beetle, Beast Boy, & Nightwing) | Justice League (Batman, Cyborg, The Flash, Superman, & Wonder Woman)

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