IFS usually sees parts in three groups: "managers" that try to control everything in advance, "firefighters" that rush to put out pain when it rises (sometimes with costly behaviours), and "exiles", wounded parts that carry old pain.
Your therapist helps you, instead of blending with a part, to look at it with curiosity and ask: what is it afraid of, and what is it trying to protect you from? When protective parts feel safe, they gradually allow you closer to wounded parts so the burdens they carry can be eased.
The work moves slowly and with the parts' permission, which is why many people experience it as gentle.