Formal:
* എന്റെ ദൂതൻ (ente doothan) - This is a literal translation, meaning "my messenger" and can be used in formal settings.
Informal:
* എന്റെ മാലാഖ (ente malaakha) - This is a more common way to say "my angel" and is less formal than "ente doothan."
Affectionate:
* എന്റെ കുഞ്ഞു മാലാഖ (ente kunju malaakha) - This means "my little angel" and is a very affectionate way to say it.
* എന്റെ സ്വർഗ്ഗത്തിലെ മാലാഖ (ente svarggathile malaakha) - This means "my angel from heaven" and is a very poetic and affectionate way to say it.
You can choose the phrase that best suits your needs and the person you are talking to.