Lexie

The untitled main antagonist of the Shortest Video on YouTube series. She is one of Mylo’s ex-girlfriends. She was originally thought to be Rylo’s assistant before being revealed as the main villain. She, like Rylo, dislikes Mylo

Shortest Video on YouTube
What type of animal she is is currently unknown, though she does have some feline features. She is a purple creature with long flowing hair. She has a black nose which is accompanied by some whiskers. Since Episode 155, her eyes have been all-over red. This is either because she was angry at Rylo or is just showing her supernatural features. She wears a grey hoodie, black trousers/pants and white trainers

MF DOOM
In the MF DOOM video on Adam Schleichkorn’s channel isthishowyougoviral, she appears with her normal eyes and in the same attire she wears in the series. She occasionally wears a peach faux fur jacket over her attire. She is often seen with a cigarette in her mouth

Her Plan
Her plan against Mylo has three phases

Phase 1

 * Phase 1 is unknown though it was most likely kidnapping Mylo’s “Papa” and questioning him

Phase 2

 * Phase 2 of her plan was to have Barkley, her henchman, dress in Mylo’s clothes and wear a Mylo Mask. Then, Barkley would attack various Mylo fans (once) by bashing into them with his skateboard. Thus making people believe Mylo is a bad person and ruining his good reputation.

It's worth noting that Barkley poorly handled his job. He bumped into the same guy two times in a row causing him to be electrocuted by her lightning eyes. Along with that, two people noticed that Barkley wasn’t Mylo. They were
 * Calum Bullock
 * Casey Chipmunk

Phase 3

 * When Rylo asked her what Phase 3 was, she replied "If Papa won't speak, we make him speak" implying that Phase 3 is to torture “Papa” into telling him Mylo’s powers

Along with all these phases, she once mentions opening up “Photochop”, possibly alluding to another part of her plan

Supernatural powers
She has many supernatural features to her


 * She has red eyes
 * She can lift people in the air with her mind
 * She can shoot lightning out of her eyes and her hands
 * She can also do this through phones

Trivia

 * She wears the same clothes as Lulu the Cat. Adam Schleichkorn, creator of the series, has stated that this is not a coincidence
 * Her model was designed in Photoshop as was every other animated model in the series
 * Her name in the MF DOOM video is C-Lashes. However, this video is non-canon
 * Who she’s voiced by is unknown
 * She is the second character to reuse a voice clip. The same voice clip of her screaming from Episode 241 is reused in Episode 293. She is preceded by Garry and followed by Rylo