At his first request, Five assumes he needs help walking, which is odd in itself. Their dynamic has changed, is still changing in the span of the last several minutes, but he hardly expects to be the one for him to turn to. It's stranger that he would instead be offering something he didn't think was possible to give.

He meets his gaze, trying to determine how much he's willing to believe in this previously unknown ability. For one, he's surprised he has any energy to spare. Maybe he recognizes that he is the one most capable of solving their crisis, or at least someone he doesn't need to protect. It's that, or all this time he was waiting for a moment of weakness to strike back at him. That last possibility seems unlikely, which is hardly a solid foundation for trust, but it's more than he might have allowed him a few weeks ago. That he even offers a choice is different enough for Five to take notice.

The debate continues until he finally reaches out his hand. An unspoken warning remains in his posture, the knife in his sleeve within easy grasp. If this is the moment Lan Wangji decides to betray him, he'll end his suffering sooner rather than later. If not, he'll follow through with his intentions and begin his search.