Tatsuya "Ta-chan, Deja Vu Boy, Tatsu" Suou
About
Date of Birth: July 27-August 21, 1981
Height: 181 cm (5'11")
Blood Type: B
Initial Persona: Vulcanus
Ultimate Persona: Apollo
Weapon: Two-Handed Swords
He's a senior student enrolling in Seven Sisters High School in Sumaru City. Tatsuya has brown hair worn long with a center part, brown eyes, and lightly tanned skin. At 5'11" (181 cm), he could be considered tall (especially in Japan).
His immediate family consists of his unnamed parents and his older brother Katsuya. Due to an incident that led to his father's forced resignation from the police force, Tatsuya has been estranged from his family for some time.
he has a pattern of skipping classes with a friend, Anna Yoshizaka. According to another student from Seven Sisters, Tatsuya always attends school, but skips lectures.
Tatsuya always carries an engraved Zippo lighter with him; and is often shown flicking the lid open and shut.
He's also an avid motorcycle enthusiast, and owns a bike of his own in both continuities. Because he is often seen performing maintenance work on his bike and works part time as a mechanic, rumors from Seven Sisters eventually give him the ability to flawlessly pilot any vehicle.
At the conclusion of the game, it is revealed that all of the events had been orchestrated by Nyarlathotep in an attempt to show that the negatives of humanity would outshine the positives in a thought game with Philemon.
Philemon tells Tatsuya that there is a way to prevent Maya's death and stop Nyarlathotep from destroying the world; everyone must give up their memories save for his, and if every other person but Tatsuya would remember anything from the destroyed reality, the world will end and Nyarlathotep will win. Tatsuya may then choose to punch Philemon out of rage over the cruel decision, or thank him for giving him a second chance. If he punches him, Philemon's mask falls off, but he will remain unfazed anyway, revealing his face as Tatsuya's and gives him a non-response, before Tatsuya reluctantly agrees with him to create a new timeline in which Nyarlathotep is not successful. If he thanks him instead, Philemon will give an encouraging speech to bid him farewell, with the same result as above.
(Source: Megami Tensei Wiki)