Blackfire

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

Biography
Blackfire was always mean to Starfire her whole life, even back when they were kids. When Starfire was five, Blackfire stole her favorite doll from her. Starfire was always nice to Blackfire no matter what she did to her. At some point later in her life, Blackfire got arrested and sent to galactic jail.

In the episode Mr. Butt, she escaped prison and visited Starfire at Titans Tower, saying that her only intent was that she just wanted to see her baby sister. Starfire brings Blackfire in, and tells the other Titans of her visit, much to their objection. Then Blackfire tricks Starfire into dressing up like her to be "twinsies", but instead, gets her arrested to serve out Blackfire's sentence instead.

The other titans later trained her to become a better older sister after this, however, by the time Blackfire became nice and more sisterly, Starfire was too filled with animosity towards her. The resentment resulted in Starfire engaging in a full-scale assault on her older sister, even destroying the doll that Blackfire returns to her in the process. She fell exhausted and unconscious from Starfire's endless onslaught, but Starfire assured the others that they "had worked things out".

Appearance
Blackfire is a teenaged girl with dark purple hair that is spiky at the bottom. She has purple eyes and pale white skin in contrast to Starfire's pale orange tone. She wears 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 Starfire's nails and eyelids respectively in that color.

Her eyes and hands glow light lavender when using her Tamaranean powers of energy projection.

Abilities and Powers
Like all Tamaraneans, Blackfire is capable of flying faster than light itself (an ability she did not possess in the DC comic books). Her powers are also further strengthened by her emotions and feelings. She is evidently much stronger and more experienced than Starfire. Her other Tamaranean abilities include: Ultraviolet Energy Projection: Just like Starfire, she can emit extremely powerful bursts of ultraviolet energy (which she calls "blackbolts") from her hands and eyes, which are colored rich lilac as opposed to Starfire's bright green ones.
 * Superhuman Strength
 * Superhuman Agility
 * Superhuman Durability
 * Superhuman Endurance
 * Superhuman Reflexes
 * Enhanced Stamina
 * Expert Martial Artist: Unlike Starfire, she is quite skilled and experienced in high-levels of alien martial arts.
 * Experienced Hand-to-Hand Combat: In addition to her martial arts skills, Blackfire knows many high-level forms of hand-to-hand combat techniques.
 * Extended Longevity: Like all Tamaraneans, Blackfire can live up to hundreds of years.
 * Decelerated Aging: Like the rest of her species, Blackfire can remain young and beautiful to match her extended lifespan.
 * Outer space Survival Skills
 * Language Assimilation: She can fluently speak any spoken language via lip contact; practically making her self-taught and more knowledge than Starfire in idioms and expressions.
 * Blackbursts: Circular blasts of light purple-colored energy she emits from her hands.
 * Black beams: She can fire beams of her "blackbolt" energy from her hands and from a distance.
 * Blackbolt Eye-beams: She also fires purple laser beams from her eyes.

Starfire
Blackfire has never liked her younger sister, even as a young child, but in the episode Mr. Butt, she wants to become a better sister after realizing Starfire loved her all these years, and she (Blackfire) broke her heart. She even returned the doll she stole from her as a five-year-old child to show she's really changed and sorry for what she has done. But Starfire, however, still continues her revenge on her. It is unknown what their sisterly relationship is now because Starfire seemed to forgive her even though she knocked Blackfire unconscious for her revenge, stating that they "worked things out."

Robin
Robin is Blackfire's possible romantic 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 to 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
At first, Blackfire didn't know how to be nice, as she was yelling at Beast Boy to be a man for his problems. After Sister School, she becomes friends with the other Titans, as she gives Raven a makeover, offers advice to Beast Boy about sisterly love, and makes Cyborg and Robin proud of her.

Appearances
Season Two Season Three Comics
 * Mr. Butt (debut)
 * Yearbook Madness (cameo)
 * I'm the Sauce (cameo)
 * Royal Pains

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.
 * She is one of the most wanted criminals in the galaxy.
 * 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 dark 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, as seen in an episode and comic of this line.
 * She is the first villain in Teen Titans Go! second season.
 * In the original Teen Titans series, she appeared as the main character in just two episodes:"Sisters" and "Betrothed."
 * She is the nineteenth villain from the original series to return.
 * Unlike Starfire, Blackfire can speak English fluently.
 * Aside from her younger sister, she is the only Tamaranean known to speak English without being taught by another; although she seems much more knowledgeable than Starfire in English idioms and expressions.
 * Blackfire's real name (Komand'r) is a pun on the word "commander", just as Starfire's real name is that of the Earth flower "coriander". This was to exemplify Blackfire's generally-militaristic personality in comparison to the more peaceful qualities of her younger sibling.
 * She appears to have a DCUbook account as seen in "Cool School".
 * She is revealed to like smoothies and chocolate milk.