Shermie is very outgoing and friendly. However, like some people, she has reservations about society at large, as she considers them stupid, when it crosses beyond her interests and profession. She doesn't seem to take battles and fighting too seriously, often dancing around and picking up her cellphone during battle. Shermie blows a kiss towards her opponent before the battle begins. She only seems to do this when fighting against a male character that she finds attractive. She seems to dislike noisy people, as seen in her special intro with Brian Battler in KOF '98 UM. Shermie has an affinity for hamsters and owns two of them as pets, a male and female pair named Achu (あちゅ Achu?) and Ururi (うるり Ururi?).
Her long bangs make it difficult to see her eyes but underneath them lies a glare with strong murderous intent. Even though she considers human society stupid, it's been noted that she enjoys her lifestyle working as a fashion designer.
In her other (mostly non-canonical) appearances, she seems to be aware of her own Orochi heritage, which sometimes reflects in her quotes. However, while she's clearly not antagonistic as with her Orochi form, she can be just as murderous, manipulative, and ruthless if provoked, especially if faced with particular foes, most notably perverted men like Kukri, and to a lesser extent, Brian.
