Octi

Octi is a blue and green octopus with a mint ice cream cone spattered on her head. She plays a rather "possessive" role in Yoshi's World: Weirder Eggs, as the rebel sister of Octo, the larger, cosmic evil of the whole Parallel world.

It Only Gets Weirder
Octi joins the Main Campaign Party in season 3, and Medium Gil is quite skeptical about her arrival: his perception is that she is a Parallel spy. This was proved false, as it did with Combo Puppy and Alpha Jiggly, and Kirby and Catty. It almost was like a repeat of what happened with Alpha in season 1, but more awareness and less "killing lab agents".

Abilities
This is where things get a little complicated. Octi's abilities come from her Parallel heritage, meaning- you guessed it- psychic powers, and no, not bleeding through the eyes, like Alpha, but a dark pink energy seen enveloping her tentacles when used. She also can appear like the Mind Flayer, an otherworldly shadow monster that does the same exact thing that Octo does (did) to Gil and multiple others. Meaning she looks like a shadow octopus with glowing white eyes. All black, except for eyes. And through this way is the first way you get to see her, unknown until later in the season (2). Her brother, however, does the dirty work. Oh yeah. She can grow exponentially in size to either get up to size with certain enemies (see Jack O. Lantern), or to frighten such people (it worked with Gil...).