Nowan is a new character introduced in Metal Slug Attack.
A shapeshifter, capable of transforming into anything it has seen. Nowan has no idea what its original form looks like, however, nor any idea as to its own identity.
Its earliest memory is of seeing a large beast, which it promptly transformed into and then believed itself to be. Sometime thereafter it encountered a beautiful young girl - transforming again, the startled original demanded it to relinquish her form. This confused the shapeshifter. "I could do that, but then what would I become?" It realised it didn't know its own shape, and asked the girl who it was - "No one!" she cried, a label it subsequently took as a name.
Although even Nowan doesn't know its own gender (or even if it has one), other characters refer to it using male pronouns - despite this, it typically takes on the form of the girl who "identified" it. In between transformations, however, it passes through the shape of a purple sphere, with a hue similar to that of a morphing Invader.
Nowan is the most skilled mimic within the Invader army, capable of transforming into anything from just a quick observation (including complex machinery, such as the Sand Marine). As such, he's quite confident in his abilities, though he tends to be found out quickly because he never accounts for behavioral cues of the people he shapeshifts into.
First appearing in the story "What I need to be Myself", Nowan approaches Odette under the guise of Annette, teasing the short alien - much to her annoyance. On their mission to Earth to spy upon a Rebel Army base, Nowan becomes bored and attracts unwanted attention by causing havoc inside of it. He is apprehended by Allen O'Neil and son, after failing to convince each that he is the other.
Odette communicates with him telepathically and comes to save him, despite his warnings of a trap. She fails, and both are imprisoned, to be informed that Navy (the then-chief scientist) has decided to experiment on Odette first thing in the morning. Overnight, Nowan covers his sleeping companion and takes on her form, but as he is led away, Annette arrives to their rescue.
- Like Percier and Heidern, Nowan makes a cameo appearance before becoming unlockable.
- His name is a pun of "No One".
- His gliding ability is very sightly similar to Batman.
- He is the first Metal Slug character that has an ability to shape shift.