Hey there. The character you went through the campaign with first will unlock their post-campaign aspects and such through the 'Destined Heroes' exotic quest, including the sub-steps 'Lost in the Light' and 'Found in the Dark'. Alt characters unlock the rest of their upgrades from banner staves around the Lost Tower that let you replay the individual missions that made the above up. Each has a set Prismatic reward, namely: Queens I & II - Grenade and melee, The Hollow I & II - Light Aspect and Super, Home I & II - Dark Aspect and Super. So specifically, it is The Hollow I that should unlock Consecration on a Prismatic Titan.