Tikal (and chaos) Boom

Bit of a story as to why Tikal as a glum face and the dark clothing.

See, when I imagined Tikal in Sonic Boom I did it based around a fan story/theory of mine which I wont get into too much detail here.
So she woke up in a lake in a deep cavern somewhere in the Boom world along with chaos aware of the previous worlds (games) and that she is in a new one.
This is sad for Tikal as she knows what happened to the other people who did not appear here and knows Sonic and pals have amnesia. But she also knows how to restore their memories, however if she does try she knows that reality itself will be her enemy. She decides to restore their memories anyways because as long as they remember, their old world can be restored as well as the people who used to dwell in it.

But since they don't know her its very likely that they'll view her as crazy, so the only way to restore their memories is by force. So in order to do this she made dark clothing (and a cloak as well as a muzzle mask not viewed here) so she can sneak her way around to not draw attention and find ways to lure Sonic and friends close so she can get to them to restore their memories. Chaos also helps with this.

She also has a power she didn't have before to help with combat which is concentrated chaos energy that she can bend in a way similar to water bending, but not quite.