Verse 6 who is this about?

This is #3 in the biblegateway list and #14 on the google list and is highlighted in the 'Hands On' Bible.

Romans 8:28
And we know that for those who love God all things work together for good, for those who are called according to his purpose.

SIS

2 Timothy 1:9
who saved us and called us to a holy calling, not because of our works but because of his own purpose and grace, which he gave us in Christ Jesus before the ages began,

Ephesians 1:10-12
as a plan for the fullness of time, to unite all things in him, things in heaven and things on earth.
11 In him (Christ) we have obtained an inheritance, having been predestined according to the purpose of him who works all things according to the counsel of his will, 12 so that we who were the first to hope in Christ might be to the praise of his glory.

Ephesians 3:9-11
and to bring to light for everyone what is the plan of the mystery hidden for ages in God who created all things, 10 so that through the church the manifold wisdom of God might now be made known to the rulers and authorities in the heavenly places. 11 This was according to the eternal purpose that he has realized in Christ Jesus our Lord,

PIC

So who are 'those who love God' and 'those who are called'. It first is for Christians and Christians alone. If you continue, to verse 30, you will read that it's people who God foreknew and predestined so they can be firstborn among brothers, having been justified and glorified. Those who love Him is not a temporary thing, 'as long as you're loving God', but us a state of condition, because that is not the basis of why we are called, justified and glorified, it is based on His love, which the chapter concludes that it is impossible to be separated from, not coming and going as ours is.

HIJ

Here is the great comfort in this verse, as when we see no good in the misery and disaster in this world, that this is not our ultimate reality. The 'good' God is looking for is that which conforms us to the image of His Son. And all things He works to that end. So confident is Paul of this fact that he puts glorified in the past tense. It's as good as done. And so I will leave you with words Paul writes earlier in the chapter,

Romans 8:18
Future Glory
18 For I consider that the sufferings of this present time are not worth comparing with the glory that is to be revealed to us.