This guide contains both of Cleofás Questlines.
(Warning!: If you have already spoke to Ludovico and got the Cord of the True Burying then if you are attempting to get the Crossed Souls achievement you now can't as you cannot not give him the Cord so make sure if you are going for the achievement to not speak with Ludovico once you've met Cleofas! Don't blame me if you lock yourself out)
So you'll meet the friendly bishop indulging in some delicious Christian torture porn in the Mother of Mothers and you can speak to him here (This section will be split up into two parts whether you release Sorocco or whether you bring the three offerings to her)
You can also interact with Sorocco (The lady being whipped) and either give her offerings or release her from her torment (Selecting either option will not preclude you from getting the miracle at the end of this questline so whichever you find is easier to do)
Once you've met Cleofas and Sorocco you can return to Ludovico in Albero and he'll give you Cord of the True Burying which will prevent Cleofas' death later on
(A side: Releasing Sorocco)
If you release her then Cleofas will be sad about being c*ckblocked and will move to High Wall of Prohibitions however, you'll need to head to The Sleeping Canvases first if you haven't already picked up The Inquisitor's Key
Once you have that key, you can speak with Cleofas in the jail cell this is in the High Wall of Prohibitions and you'll need to have at least defeated one boss and got a mask in order to access...
Here if you already have the Cord of the True Burying you can give it to him and that'll prevent him from committing suicide (however, you will not be able to get the Crossing Souls achievement) if you wish to get the achievement provided you haven't gotten the cord then just speak with him here and he'll move over to the ledge in Archcathedral Rooftops
(B Side: Allowing Sorocco to Ascend)
You'll need three marks of the refuge in order to complete this side to do this you'll need to have beaten two bosses and reached Archcathedral Rooftops so have both of the masks and use them on the Elevator
First one you have to face is just an Anointed Legion solider basically just the Ezdras fight with less mechanics not too hard and you can parry all of his attacks...
Second one you have to face an Anointed Legion solider and a flying boi little bit more trickier just watch out for the swoops...
The last one you have to face an Anointed Legion solider and TWO flying bois so yeah... same thing really
Once you have gotten all three marks return to Sorocco and offer them to her
She will then ascend and this will allow you to speak with Cleofás to move him to the ledge, if you are unsure if he's moved just leave the room and enter it again and if he's gone then you did it right
He'll move here in the Archcathedral Rooftops and you can either talk with him twice to get him to kill himself for the Crossing Souls achievement or you can give him Cord of the True Burying in order for him to move to his final area in Albero (Note: If you are getting the Crossing Souls achievement you cannot get the miracle in this questline so you'll not be able to get 100%). Once, you have spoken to him leave the room and enter he'll either be gone or if you are doing the achievement you'll hear a crazy scream and you'll know he's thrown himself off the roof
You can now speak to Redento and you'll get the achievement
Cleofás 2 (Steam's Atrocious Word Limit)
Alternatively, If you did give him the Cord of the True Burying he'll move here (apologies, i'll try and grab some screenshots of him inside as once you've spoken to him inside you are locked out from entering the chapel...) The chapel doors should be unlocked for you and you can go inside and speak with him and get the miracle Tiento to your Thorned Hairs which gives you temporarily invincibility
And that's the end of his questline!