Will having a Hirono plush pendant on my work bag be perceived as unprofessional?

To be more specific, I work in behavioral therapy and would take a leather backpack/crossbody bag to work with me. The Soul Corroder plush pendant is so cute and I would love it on my bag but I worry it will be too big and seen as too silly or childish? It'd be my first Hirono too! Would love to hear your thoughts.