Strong-willed, stubborn, and opinionated like most Halliwell women, Melinda is very independent. She is somewhat conceited and prideful, traits of which Gideon warns. She has a hero and superiority complex which she doesn't hide. She represses her emotions in favor of sarcasm and she let's people know that she is the one in control.
She has a knack for learning new languages. She's fluent in three languages: English, French, and Japanese. Currently she is studying Spanish and German. She is highly skilled in hand-to-hand combat because, while living with her Aunt Prue, Melinda took karate classes all the way to black belt. She's also a talented fencer which is apropriate given her being the true weilder of Excalibur.
Her sword, Excalibur (it is apparently female and Melinda calls it "Cali"). She's quite protective about it and polishes it several times a week. She always wears a silver necklace with the triquetra pendant on it given to her by her Aunt Phoebe when she was four. She wears mostly dark colors, blacks, blues, purples, etc.
Due to being half-whitelighter, Melinda can orb (teleportation through bright white and blue lights) and glamour herself and others. From her witch side Melinda has the ability of telekinesis as her aunt had and often uses it to enhance her fighting abilities (ie. superstrength/levitation mimicry). She shares an almost empathic connection to her Excalibur.