The two Yoshimitsu characters of the Soul series -- The first appearing in Soul Calibur through Soul Calibur IV, the second from Soul Calibur V -- are the ancestors of the Yoshimitsu from the Tekken series.
Contributed by KidDivinegon
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In the Korean versions of the first 2 games, the character "Mitsurugi" was replaced with a new character, "Arthur", a Caucasian who fights and dresses like a samurai. It's likely that this change was made due to Korea's fickle relationship with Japan, and that Korea actively discourages samurai imagery and references. Mitsurugi was eventually added to Soul Calibur in Korea, replacing Arthur. Nods to Arthur can be seen in later entries in the series, even outside of Korea. These range from fighting him in certain modes.
Contributed by DidYouKnowGaming