Tad

Appearance
Tad is simply a green frog. His name most likely comes from the word 'tadpole', the name given to a young frog.

House
Tad's house has a loosely aquatic theme, with a paddling pool, goldfish and the entire froggy set. Tad also has various gyroids and two elephant slides. These slides, combined with the playroom wall, reinforce impressions that Tad is very young, hence the name. This implication, however, is not mentioned in-game.