For example adopting a Matou Sakura, and then raising her after 4HGW, and then 100%ing her a few years before 5HGW, gain, idk, 100% copy of Dark Sakura (no ailments)... maybe also every big increment, like 25%/50%/75%, also gain an alt template, like one is a Tohsaka Sakura, one is a Edelfelt Sakura, and one is Emiya Sakura who was saved by Kiritsugu and became a magus killer