The dagger symbolizes bravery and brawn, darkness and lostness.
The rose symbolizes love,
joy, redemption and hope.
How the rose and dagger is depicted together influences it's meaning.
If the dagger is pierced into the rose, together it symbolizes betrayal, pain, and the loss of these rose symbolisms such as losing the love of your life.
If the rose is being wrapped around the dagger, it could have
two meanings. One, a human who
may seem like a nice person or a trust worthy person, but underneath is a menace to
society. Or two, the classic opposites attract. Two
people of two completely different natures coming together, like the rose and the dagger. One to redeem the other, who is unknown to himself. Like Wenwu and his
wife (Marvel), or even the cliché good
girl bad guy pairing.
It can also be used as a phrase to describe such a person, or couple, or situation.
"Now that's a rose and dagger
relationship," Charles sighed. "Let's see how this
ends."
"I should have known he was a rose and dagger,"
Ryder groaned. "I'm so oblivious, it's painful."