Common Sense says
When Robin starts a smear campaign against all of the other Titans so that he can be reelected as Team Leader, Raven uses a time machine to bring a great leader from the past to teach Robin how to lead. A giant cloud of smoke appears in front of them, and Robin appears, announcing that he has spent the entire night making a special video for them to watch. The Titans eagerly encourage him to play the video immediately. Robin puts the video into the VCR, then sits down on the couch next to his friends. The video begins to play, with Robin as the narrator. In the video, Robin introduces Cyborg. Cyborg becomes excited, assuming this is a video about him.
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When drinking tea turns the other Titans British, it's up to Robin to save America from another British invasion brought by the Queen of England herself and save his teammates. The story opens up with Starfire , Raven , and Beast Boy having their own bowls of cereal in the dining room. After Starfire and Raven throw away their teacups, Robin yells at Cyborg and Cyborg tells him to chillax, but Robin warns them that tea is from Great Britain and in order to tell them how drinking tea is dangerous, he gives an inaccurate history on tea linked to British Invasion and involved the Bald Eagle, the Statue of Liberty and George Washington to save the day which Beast Boy questions it being part of American history at first yet Robin forces him to keep quiet. However, a wooden crate containing tea bags is then imported into the tower. Starfire excitedly tells him to join the three of them and watch the "telly", and he asks her back in a snotty and disrespectful way, "Who calls the TV a 'telly'? Nevertheless, he soon sniffs an ominous breakfast smell, and he immediately questions Cyborg who walks in with the plate of food. Cyborg replies that there are bacon strips, eggs, toast, and hash browns, which makes Robin feel relieved at first and claims it's a way to be American - until Cyborg continues with black pudding, baked beans, mushrooms and tomatoes, and Robin furiously calls the breakfast "foul English" after recovering from shock and figures out that the four have drunk the tea, which Raven admits.
Although he is the only one of the group without any superpowers, by virtue of his heroic experience and reputation, Robin is the highly disciplined leader of the Teen Titans. As elaborated upon in the "Go" episode,  Robin forms the group after aiding Starfire in her escape from captivity, with the help of Beast Boy , Cyborg , and Raven. Prior to this, he left his mentor implied to be Batman , in an effort to make it on their own as crime-fighters. The series never explicitly reveals his secret identity, but he is implied to be Dick Grayson , the original Robin. The Teen Titans Go! Starfire as translated into English is a humanoid alien female from a planet called Tamaran. As learned in the episode "Betrothed",  her real name and title is Princess Koriand'r.