Grandma’s an angel?
BQ: One of my friends was talking about some people saying things about "people becoming angels." While I'd never encountered that, do people become angels when they die?

A: "But you have come to Mount Zion and to the city of the living God, the heavenly Jerusalem, to an innumerable company of angels, to the general assembly and church of the firstborn who are registered in heaven, to God the Judge of all, to the spirits of just men made perfect" (Hebrews 12:22-23). There are two categories of beings: an innumerable company of angels, and spirits of just men made perfect. Angels and men are never the same.

The Bible states that all things, including angels, were created:

"For by Him all things were created that are in heaven and that are on earth, visible and invisible, whether thrones or dominions or principalities or powers. All things were created through Him and for Him. And He is before all things, and in Him all things consist" (Colossians 1:16-17).

"Praise Him, all His angels; Praise Him, all His hosts! ... Let them praise the name of the LORD, For He commanded and they were created" (Psalms 148:2).

Angels and people are not the same. People do not become angels. 
(PN211)