This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
殾 is a rare character combining 者 and 殳. The exact historical development is uncertain, and it may be a variant or a character used in specific contexts.
With 者 (person) and 殳 (a weapon or action), imagine a person building something with a tool, but the exact meaning is unclear.
For シュン, imagine a person named Shun (シュン) using a tool to build: Shun -> シュン.