Which counsellor behaviour indicates a reflexive counsellor?

The question asks which counsellor behaviour indicates a reflexive counsellor.

• A reflexive counsellor is one who is aware of their own internal state, biases, and how their behaviour impacts the client. They continuously reflect on their actions and feelings during the counselling process.

Let's evaluate the options:

• B. "The counsellor who is in touch with her/his own woundedness and uses that to deepen her/his own empathic understanding of the client's painful experience." This describes empathy and self-awareness, which are important but not the primary definition of reflexivity.
• C. "The counsellor who is aware that reality is co-constructed, therefore her/his own views of the client's reality cannot be the only reality." This describes a constructivist perspective, acknowledging multiple realities, which is a component of good counselling but not specifically reflexivity.
• D. "The counsellor who is in touch with her/his emotional state and is aware of the impact of her/his behaviour on clients' perceptions of themselves during the counselling encounter." This option directly addresses self-awareness of one's emotional state and the impact of one's own behaviour on the client, which is the core of reflexivity in counselling.

Therefore, option D best describes a reflexive counsellor.

The final answer is $\boxed{\text{D}}$.