Hey Shutter, I'm just curious about something: where did Arc/Ciel as a pair and ship come from? Their interactions in Tsukihime?
It came from one of the Ciel route ends where rather than leaving, Arcueid instead forces Ciel to share Shiki with her. This later got expounded on in Melty Blood to Arcueid wanting Ciel for herself as well, with both Archetype Earth and Red Arcueid at different points telling Ciel that Arcueid has grown to really like her in spite of their constant fighting.
In Archetype Earth's arcade mode, Archetype Earth attempts to erase all of humanity in one go and restarting the world with herself on top, but plans to keep Shiki and Ciel with her in the new world. Ciel then fights with Archetype Earth for humanity.
Some of the gag manga also took this and ran with a joke that Arcueid is obsessed with Ciel's fat ass.
