Angels are the slaves of Allah Almighty neither human nor ghost but are created with nur (Light).

Quran says: 

يٰۤاَيُّهَا الَّذِيۡنَ اٰمَنُوۡا قُوۡۤا اَنۡفُسَكُمۡ وَاَهۡلِيۡكُمۡ نَارًا وَّقُوۡدُهَا النَّاسُ وَالۡحِجَارَةُ عَلَيۡهَا مَلٰٓئِكَةٌ غِلَاظٌ شِدَادٌ لَّا يَعۡصُوۡنَ اللّٰهَ مَاۤ اَمَرَهُمۡ وَيَفۡعَلُوۡنَ مَا يُؤۡمَرُوۡنَ ۞

O you who have believed, protect yourselves and your families from a Fire whose fuel is people and stones, over which are [appointed] angels, harsh and severe; they do not disobey Allah in what He commands them but do what they are commanded.

Surah Tahrim Ayah No 6:

They make dua for Muslims as;

اَلَّذِيۡنَ يَحۡمِلُوۡنَ الۡعَرۡشَ وَمَنۡ حَوۡلَهٗ يُسَبِّحُوۡنَ بِحَمۡدِ رَبِّهِمۡ وَيُؤۡمِنُوۡنَ بِهٖ وَيَسۡتَغۡفِرُوۡنَ لِلَّذِيۡنَ اٰمَنُوۡا‌ ۚ رَبَّنَا وَسِعۡتَ كُلَّ شَىۡءٍ رَّحۡمَةً وَّعِلۡمًا فَاغۡفِرۡ لِلَّذِيۡنَ تَابُوۡا وَاتَّبَعُوۡا سَبِيۡلَكَ وَقِهِمۡ عَذَابَ الۡجَحِيۡمِ ۞

Those [angels] who carry the Throne and those around it exalt [ Allah ] with praise of their Lord and believe in Him and ask forgiveness for those who have believed, [saying], "Our Lord, You have encompassed all things in mercy and knowledge, so forgive those who have repented and followed Your way and protect them from the punishment of Hellfire.

Surah Gafir Ayah No 7

Some angels are kiraman katebeen كِرَاما كَاتِبِيْن as described by Allah SWT

كِرَامًا كَاتِبِيۡنَ ۞

noble scribes,

Surah Infitaar: Ayah No 11