Protector

n.kind, resilientwarm

What it means

A person or thing that deliberately keeps someone or something valued from harm.

Reach for it when naming an active safeguarding role, whether personal, civic, or physical

The old dunes are a natural protector of the village during winter storms.

playful
watchdog
when monitoring institutions and sounding alarms is central
not when The label can sound adversarial and is not affectionate personal praise.
warm
steward
when responsible long-term care preserves what was entrusted
not when Stewardship manages and sustains; it may involve no threat.
professional
advocate
when speaking up protects rights or access
not when An advocate may influence decisions without directly preventing harm.
professional
defender
when resisting attack or criticism is the active role
not when Defense is combative and does not include every form of protection.
formal
custodian
when preserving an asset, place, or tradition is the responsibility
not when It suggests stewardship and maintenance more than immediate safety.
formal
guardian
when an entrusted duty of care or custody is central
not when Guardian may be a legal role and can overstate informal support.
literary
keeper
when continuing care for a place or valued object is intended
not when The word can imply possession and is vague without an object.
literary
shield
when something physically or figuratively absorbs danger
not when The metaphor can erase the protected person's own role.

fierce protector
She was a fierce protector of the children's right to be heard.
natural protector
The wetland acts as a natural protector against storm surges.
protector of rights
The ombudsman became a trusted protector of residents' rights.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.