Rectangle

Rectangle is the host assistant of Inanimate Objects.

Personality
Rectangle is a friendly one who he is ready to help the host of the show on anything needed, mainly because its his job and its what he likes doing.

Trivia

 * Rectangle is the older brother of Blue Rectangle.
 * In the original Inanimate Objects, Rectangle was the host.
 * As confirmed in the camp "Camp Of Rectangular Entities" having 18 rectangles with various colors.
 * As confirmed in CuriousCat, of all of the 18 siblings Rectangle is the oldest