Taking its name from the Scottish mythology fairy Cat-sìth, he is a fortune-telling robot that initially joins the group to act as a spy for the game's ShinRa corporation, controlled remotely by their employee Reeve Tuesti (リーブ・トゥエスティ, Rību Tuesuti).

Named after the Scottish mythology fairy Cat-sìth, Cait Sith was designed by lead Tetsuya Nomura to be two characters combined into one, a concept he wanted to include since the beginning of development.

[12] For Final Fantasy VII Rebirth, part of a series of titles serving as a remaking of the original game, battle director Teruki Endo had a difficult time developing his gameplay aspect.

Believing there were two approaches to gameplay archetypes, "standard" and "oddball", he went with the latter due to Cait Sith's appearance while tweaking it up until the final stages of develop to ensure "it didn't have too many quirks".

[14] Standing 100 cm (3 ft 4 in) tall, Cait Sith resembles a bipedal tuxedo cat with gray fur, having a white belly, tail tip, paws, and a patch in an upward-pointing triangle pattern on his face.

[12] Reeve meanwhile stands 180 cm (5 ft 11 in) tall, and has long black hair slicked back and a trimmed beard, wearing a blue suit with a red tie.

Kazeno aimed for cuteness in his design and unveiled it at a meeting during Remake's development, only to be surprised when he was informed Cait Sith was not going to be a playable character until the next title, Final Fantasy VII Rebirth.

As a robot, he can be rebuilt and replaced and is controlled by Reeve Tuesti, whose original intent during Final Fantasy VII was to infiltrate Cloud's group and sabotage their resistance efforts on behalf of his Shinra employers.

[18] After having a change of heart, he decides to help the group, even risking his life by destroying a version of himself to extract the Black Materia Sephiroth needs to summon the Meteor spell.

Andriessen of Destructoid expressed a heavy disdain for the character, stating that while he initially assumed Cait Sith would be one of his favorites in Final Fantasy VII due to his design and choice of weapon, his perspective was soured his quickly by the double-cross.

She cited Cait Sith as an example of a reformed villain, a character archetype she felt many enjoyed, and pointed out that through much of the story he didn't have a choice in his actions, and quickly attempts to make amends afterward.