There are warrior angels who can fight demons.
There are different orders of angels that are called angelic choirs.
First Sphere
These angels are said to be direct servant of God.

Francesco Botticini
And I said: Woe is me!
And I said, Here am I; send me!
Cherubim:Cherubs originally were created to guard the Garden of Eden.

Some scholars believe Satan is a fallen Dherub.
The word for this depiction isPutto.
Thrones:Thrones are named because they are the angels that carry Gods throne.

Giotto
Sometimes they are depicted as wheels with eyes on the throne or chariot of God.
They are sometimes portrayed as older men who are elders in Christs community.
Second Sphere
This sphere of angels rule over Earth.

Francesco Botticini
Dominions:Dominions (sometimes call Lordships) look like attractive humans with feathered wings.
Their job is to preside over the lesser angels.
The can leave signs for the faithful to follow and even perform miracles.

Guido Reni
They are guides, messengers, and protectors.
They rule over other angels and send them on missions to get to accomplish their protection role.
Because of this, they are typically depicted wearing crowns and/or holding scepters.
Archangels:Archangel means chief angel.
In Judaism, there are seven Archangels.
Angels:Angels are the foot soldiers of the angel hierarchy.
They send messages or carry out the tasks assigned to them by other angels.
Personal guardian angels are these kind of angels.