Raniya's gossip partner. Dimah has been blabbing away for so long that she wound up missing her chance to meet a nice man. This would undoubtedly bother her if she weren't too busy gabbing to notice. — Directory, Sonic Unleashed
During the events of Sonic Unleashed, Dimah and Rainya met Sonic the Hedgehog and Chip when they first arrived in Shamar. Upon meeting Sonic and Chip, Rainya began answering some of the questions they had begun to ask her, with Dimah helping her friend by elaborating on her explanations. When Rainya told Sonic and Chip about Shamar, Dimah added that the old ruins outside of the town had a lot of history. As Rainya then brought up that the old pillars could crumble, Dimah confirmed it and noted that the pillars could start cracking without warning, before additionally saying that Rainya spoke the truth when she commented on the pillar's way of falling and that she would be careful if she was Sonic and Chip. Following up on Sonic's question of how the people in Shamar were like, Dimah told Sonic and Chip, after Rainya had told them something the Shamaran people, that the Shamaran people were merchants and that Ara's shop was the highest rated in Shamar. As Rainya commented on Ara's business skills, Dimah told Sonic and Chip that Ara sold and bought like possessed.
Later on, after Sonic had cleared up the enemies in Shamar and Empire City, Dimah and Rainya met Sonic and Chip again. After Rainya had told Sonic to see Professor Pickle fast, Dimah asked Rainya of how fast she meant. As Rainya said that meant as fast as a cannonball, Dimah asked her if that would make Sonic look like a shooting star at night.
After Shamar's continent had been restored by Sonic and Chip, Dimah and Rainya met up with Sonic and Chip once more. After Rainya told them how the planet was closer to being whole, Dimah asked Rainya what it sounded to her when the continent reconnected with the planet. As Rainya said that it sounded like a "BOOM" and "CRASH", Dimah was skeptical and asked if it sounded like a "CRASH" and then "BOOM". After then having let Rainya voice her opinion, Dimah suggested to Sonic that he should report to Professor Pickle now.
Some time afterwards, Dimah and Rainya met Sonic and Chip again when they were heading for Adabat. After Rainya told Sonic and Chip about how Adabat's jungle was like an oasis of green, Dimah wondered if that was true. As Rainya confirmed her statement, Dimah asked Rainya if it was like a sea of date palms, but was informed that it was not the case. Dimah then told Sonic and Chip that whatever the case was, they had to be careful.
After Sonic and Chip managed to restore Adabat's continent, Dimah was told by Rainya that Adabat's continent had returned to its proper place, which Dimah replied that she had heard too and asked Rainya what the impact from Adabat's continent sounded like. Though Rainya thought it sounded like a "BOOM" and "CRASH", Dimah believed that she meant a "CRASH" and then "BOOM", but Rainya disagreed with her. Just then, Dimah and Rainya saw that Sonic and Chip had arrived, and, after Rainya had told them to report to Professor Pickle, Dimah told Sonic and Chip that she hoped that they would restore the rest of the earth with a "CRASH" and "BOOM", which Rainya started to agree with.
Later on, when Sonic and Chip were heading out to restore the final continent, Dimah and Raniya met them again, where Dimah told Sonic to smack Badniks with a "BAM" and a "POW" before sh was told by Rainya that it would sound more like a "KLANG" and a "KLONK", something which she agreed with.
After Super Sonic and the Gaia Colossus's confrontation with Perfect Dark Gaia, Dimah rejoiced with the rest of her town when the world returned to normal following Perfect Dark Gaia's defeat.
Dimah never made an in-game appearance during the Wii/PlayStation 2 version of Sonic Unleashed, and only appeared during the pre-rendered cutscenes. After Super Sonic and the Gaia Colossus's confrontation with Perfect Dark Gaia, Dimah rejoiced with the rest of her town when the world returned to normal following Perfect Dark Gaia's defeat.
Dimah loves to chat and gossip about the day's events, especially with her good friend Raniya, though it often leads to rather long-winded conversations. Even on the most uneventful day, she can find some new morsel to talk about. In fact, she has blabbered for so long that she has become oblivious for much else, like meeting a nice man or noticing that she had missed her chance to meet a man.