Explosively.

You decide that subtlety is for small people, and, sword drawn, kick the door down.

The effect is immediate; Cassandra's smile is replaced with a look of shock, and the mage takes a frightened half-step back.

You use this moment to your advantage, closing the distance between you and Kyra in two massive strides.

You fall into a fighting stance next to her, considering your opponents.

Cassandra is the primary physical threat, but the mage would be the real trouble if she could get a spell off.

Kyra, apparently thinking the same thing, leans over and says to you:

"I'll keep pressure on the mage, you handle the spear woman."

You nod, and the two of you begin to advance.