Dress up as an anime character at a conference, say

• Comic-Con activity
• Comic-Con dress-up
• Dressing up as a fictional character with others
• Dress-up at a comic con
• Activity at a comic con

Wikipedia Word definitions in Wikipedia
, a contraction of the words costume play , is a performance art in which participants called cosplayers wear costumes and fashion accessories to represent a specific character . Cosplayers often interact to create a subculture and a broader use of the ...

Wiktionary Word definitions in Wiktionary
n. 1 (context uncountable English) The art or practice of costume oneself as a (usually fictional) character. 2 (context countable English) A skit or instance of this art or practice. vb. 1 (context intransitive English) To costume oneself as a character. ...