荣介 is the kanji form of the Japanese masculine name
栄介 /
榮介 (Eisuke or Yōsuke), in which
介 is a common ending suffix (-suke 'helper, mediator') for boys' names — see also
龙介,
大介,
慎介. When you encounter a 〜
介 name in Chinese subtitles, it's almost always a Japanese character.
