This is the 7258th most frequent Japanese word.
世良
"世良" is a Japanese surname; it does not have a specific standalone meaning in English.
世良 is used as a proper noun referring to a person's name.
世良は親切な人ですね。
Sera is a kind person.
世良 is used to refer to and give context to a person in a conversational topic.
世良と言えば、昨日映画を観たそうです。
Speaking of Sera, it seems they watched a movie yesterday.
世良 is part of a possessive phrase, denoting ownership or association of ideas to Sera.