Devineaux is brave to the point of recklessness, willing to attempt daring jumps and stunts in his pursuit of Carmen. Devineaux is patriotic: when captured by V.I.L.E., he attempts to resist their mind control device by singing La Marseillaise, the national anthem of France.

He is a good detective but will often rush into situations without forethought and considering consequences. It has been seen that he is capable of detailed detective work.