Internal character codename for Byleth in Super Smash Bros. Ultimate was "Master"

Internal codenames are a common practice for projects in development at different game studios. DLC characters for Super Smash Bros. Ultimate are no exception, and it's interesting to see the different codenames that were used for each fighter. Joker from Persona 5 was known as "Jack", Hero from Dragon Quest was known as "Brave", and so on and so forth. With the recent launch of Challenger Pack 5, Byleth from Fire Emblem Three Houses is the latest character for us to receive previously publicly hidden information. According to PushDustin on Twitter, Byleth was internally referred to as "Master", which is likely a translation of "Sensei".