Blackfire

Blackfire (Komand'r) is the evil older sister of Starfire who makes her first appearance in Mr. Butt.

Biography
Blackfire was always mean to Starfire her whole life, even back when they were little babies. When they were five, Blackfire stole Starfire's doll from her. Starfire was always nice to Blackfire no matter what she did to her. At some point in her life, Blackfire got arrested. In the episode Mr. Butt, she escaped prison and visited Starfire at the Tower saying that her visitation was because she just wanted to see her baby sister. Once Starfire showed the other Titans, Blackfire dressed Starfire up like her and got her arrested. The other titans trained her to become a better sister after this, however, by the time Blackfire became nice, Starfire was too filled with animosity towards her. The animosity resulted with Starfire engaging in a full-scale assault on her sister, even destroying the doll that Blackfire returns to her in the process.

Appearance
Blackfire is a girl with dark purple hair that is spiky at the bottom. She has purple eyes and pale white skin. She swears a black and silver two piece dress with dark purple gems in it. She also wear long black and silver boots with black flames on the bottom. Though not normally visible, in Mr. Butt, it is revealed that she wears dark purple nail polish and eyeliner. Blackfire can be seen painting Strafire's nails and eyelids respectively in the color.

Starfire
Blackfire does not like her sister but in the episode Mr. Butt, she wants to become a good sister after realizing Starfire loved her all these years and broke her heart. She even returned the doll she stole from her as a child to show she's really changed and sorry for what she has done. But Starfire still continues her revenge on her. It is unknown what their relationship is now because Starfire seemed to forgive her even though she knocked Blackfire unconscious from her revenge.

Robin
Robin is Blackfire's love interest, although she is mainly attracted to his rear, as she constantly calls him "Mr. Butt" and is shown to focus on it, to which Robin detests. At first, Robin is shown to strongly dislike Blackfire due to her terrible treatment of her sister, Starfire. After Blackfire takes "Sister School" seriously, Robin is shown to be much nicer and allowed Blackfire to call him "Mr. Butt" and showed concern for her after Starfire finished her revenge on her.

Other Titans
She becomes friends with the other Titans and gives Raven a makeover and talks, and gives advice to Beast Boy about love and makes Cyborg proud of her.

Episode Appearances
Season 2
 * Mr. Butt (debut)

Trivia

 * Although the series's creators were unsure about Slade or Blackfire ever making an appearance in the series, Scott Menville confirmed the return of Blackfire in season 2 of Teen Titans Go! via his twitter account.
 * Blackfire is voiced by Hynden Walch, who also provides the voice of Starfire, her sister.
 * Like in the original series, Blackfire is near-identical to Starfire in appearances. However, this series appears to have added a few more: Blackfire's skin is now paler, and her hair is not as long as that of her sister and is now purple instead of black.
 * Like in the original series' episode "Sisters", Blackfire seems to be attracted to Robin. This appears to have elevated to an infatuation, particularly in his rear, hence the title of the episode.
 * She is the first villain in Teen Titans Go's second season.
 * She is the eighteenth villain from the original series to return.
 * Despite being one of the Titans' most formidable opponents, she has only appeared in one episode (Mr. Butt) so far.
 * Unlike Starfire, Blackfire can speak fluently.
 * Aside from Starfire, she is the only Tamaranean to speak English without being taught.

Gallery
The gallery for Blackfire can be viewed here.