Robin is the leader and one of the five founding members of the Teen Titans. Robin is a natural-born leader. In the DC comics and other incarnations, Robin is even toned and playful despite some outbursts of rage, such as when he learns of his parents' killer and when he eventually stops working as Batman's sidekick. However, in this series, Robin is closer to Batman; serious, stern, strict and obsessed with hunting down criminals, which is most prominently displayed in the first season.
Out of all the villains the team has faced, the one that is most hated is Slade. Robin will stop at nothing to defeat Slade. Robin insists that the two are nothing alike, despite Slade's claims to the contrary. Several encounters with him have lead dangerously close to causing rifts between Robin and his friends. As for Starfire it it shown that Robin really cares about her and it it obvious to the others and a few of the villians that Robin really likes her more than a friend but he never admitted his feelings to her till the movie Teen Titans: Trouble in Tokyo. Robin must put aside his fixation on Slade and put more trust in his teammates if he wishes to resolve the threat. Another flaw Robin has is he is competitive and still a bit immature but, despite his struggles, Robin has time and again proven to be a great leader. He cares for all of his friends deeply, and will fight to the finish to defend them.
Robin is always shown in just his costume that is consisted of green tights with black steel-toed boots, a green short-sleeved shirt underneath a red armored vest with a yellow "R" over his left pectoral muscle, a yellow utility belt and a black cape that has a yellow interior. He always has on a black-and-white domino mask, has his black hair spiked backwards, average-toned skin and an athletic-build. When he is briefly shown as Slade's apprentice, he wears a black bodysuit with armor plating on the legs, knees, forearms, shoulders, the top-half of his suit is split into black and orange sides and an ash-gray utility belt.
During the movie "Teen Titans: Trouble in Tokyo", he briefly changes into a costume with his hair down with black shades and a skinny black suit with a long jacket in order to hide from Tokyo Troopers when he was wanted for the "murder" of Saico-Tek. He took a man into an alley and switched clothes with him.
Robin might be short for his age. Out of his four companions, Beast Boy seems to be the only one shorter, and it should be noted that Raven is depicted as the same height or a little shorter than Robin. Also, in Calling All Titans , when he gave Bushido the communicator, Bushido seemed to be at least a couple inches taller than him.
In the Season 3 episode "Revolution" Mad Mod drains Robin's youth which makes Robin a frail old man and him young again. As an old man, Robin is so weak he can't even walk, he also seems to be very thin and his arms and legs are like bones. Robin is thin everywhere on his body except for his stomach where he seems to have grown a potbelly. While the young Robin wears his hair spiked backwards, the old and frail Robin has white hair which seems to be slicked back.
When Robin is Nightwing, he has long hair which almost touches his shoulders, he also doesn't spike his hair anymore. He also has a more muscular build and has grown much taller, his costume is a black jumpsuit with steel bracelets and a utility belt, he also still wears his steel toed boots. Nightwing's costume also has a symbol of a bird like a hawk, on his torso and it is a dark shade of blue. The bird on his costume also seems to be spreading its wings out as if it is flying.
Starfire is an alien girl from the planet Tamaran and one of the five founding members of the Teen Titans. Starfire is joyous, naive, and somewhat insecure, but her naivete is not to be mistaken for stupidity. An alien and an outsider, she is still rather new to Earth and its customs. This leads to much confusion for her and others, such as the awkwardness in casually drinking mustard as a beverage, and thinking cotton candy and cotton balls are the same thing. She takes friendship very seriously, and is easily distressed when others, especially her friends, argue or fight. Starfire is particularly indignant to the point of snubbing her teammates when she believes they do not care for her friendship or company. She is arguably the most social of the Titans, regularly meditating with Raven, or lifting weights with Cyborg. Above all, she wishes to be friends with everyone she meets, and for everyone to get along. She also insists on sharing her own customs with other members of the team, but doesn't generally take offense when they don't understand or refuse her. In one instance, she lies about a holiday celebrated by destroying drapery and blows up a window to explain an accidentally torn curtain; an act that barely registers as odd behavior by the others. Presumably because English is not her first language, Starfire speaks without contractions, and misuses idioms. Additionally, she uses several Tamaranean nouns, such as "bumgorf" (term of endearment towards one's own child), "K'norfka" (parent or guardian), "clorbag valblernelk" (insulting term), "G'lufnog" (bless you; said after one sneezes), and "shlorvak" (dream).
Starfire's personality changed dramatically from her first meeting with the Titans. She demonstrated her power and strength as she escaped from the Gordanian ship. While others saw rampant destruction without a cause, Raven saw her trying to free herself from her handcuffs. As mentioned above, it seems Tamaraneans learn language through lip contact, and having gotten what she wanted from Robin, she leaves him with a warning to leave her alone, she flies away knowing full well that the Gordanians were still hot on her trail.
As she fought against the Gordanians with the four other young heroes, her personality calmed dramatically, and she eventually apologized for the destruction she had caused during her escape.
This change in behaviour suggests Starfire truly was, at heart, a somewhat friendly, warm-hearted character. The reckless behavior seen in the beginning of the episode might lend some credence to why Tamaraneans are so feared throughout the galaxy - their strength is not easily matched. It also proves that Starfire, when the time is right, is not afraid to "kick the butt".
While naive, she is extremely perceptive. While knowing Robin and Slade had similar personalities, she refused to believe he had gone to be Slade's apprentice of his own accord, spending hours looking for him. Later, she states that she "cannot live in a world where they must fight," showing that she values her friends more than anything.
Starfire cares about each of her friends but there is one person whom she likes more than a friend and that's Robin. Since the day they met both her and Robin have liked each other and it became obvious to the other's along with a few villains there have also been multiple hints throughout the show that they have liked one another. Robin and Starfire didn't admit their feelings for each other till the movie Teen Titans Trouble in Tokyo where they share a few scene's with each other and have attempted to kiss twice. By the end of the movie Robin and Starfire finally revealed their feelings for each other and they finally shared a real kiss.
Starfire is shown to be quite pretty. Her eyes, hair, skin, and outfit view her as colorful in comparison to Raven. Her long fiery-red hair is down to her waist and straight with bangs. She has small eyebrows, and green eyes with light-green scleras. She is tall, with bright orange skin, and her outfit is mostly purple with a belt, her neck and arm plates being silver. She wears a sleeveless top showing her midriff, a purple mini-skirt, and thigh-high purple boots. As a Tamaranean, she has alien physiology which includes a long purple tongue and nine stomachs, probably for storing food during meager times.
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