Alex is one of the two main protagonists of Minecraft. Alex is one of the two default skins that the player is given upon creating a Minecraft account, the other being Steve. Compared to Steve, the "Alex" body model has thinner arms, thus giving the player's skin a thinner appearance than should they use the "Steve" model.
Compared to Steve, Alex's design features clearer skin and a more unique character design, opting to be a recognizable avatar over the more-generic design of her male counterpart. In her most recognizable default design Alex has long orange hair that she wears over her left shoulder and drapes across her light green T-shirt that features darker green accents and cuffs. She wears brown pants and has light brown, almost-grey, boots. Much like Steve, her appearance is very angular, matching the blocky aesthetic of Minecraft, and because of this she only feature 2 pixel-wide green eyes that make her appear cross-eyed.
Alex appears in Jake's Super Smash Bros. as a playable character. Her moveset is shared with Steve, and she takes up half of his alternate costumes. While the two play exactly the same, Alex is recognized by the in-game announcer as a character separate from Steve.