Flyby. The guardian angel doesn't provoke opportunity attacks when it flies out of an enemy's reach

Innate Spellcasting. The guardian angel's spellcasting ability is Charisma (spell save DC 11). It can innately cast the following spells, requiring only verbal components:

At will: thaumaturgy

1/day: healing word

Heart Sight. The guardian angel touches a creature and magically knows the creature's current emotional state. If the target fails a DC 11 Charisma saving throw, the guardian angel also knows the creature's alignment. Celestials, fiends, and undead automatically fail the saving throw.

Invisibility. The guardian angel magically turns invisible until it attacks or casts a spell, or until its concentration ends (as if concentrating on a spell). Any equipment the guardian angel wears or carries is invisible with it.