okay i know that i drew a dw au with will as the doctor and nico as clara BUT… Doctor Who AU with Nico as the Doctor (12 specifically, grumpy, jaded, not great with people skills but in love with humanity) and Will as Clara (positive, bubbly, kinda bossy, cares for people a lot)… specifically Dark Water and Death in Heaven.
Will has a partner who dies and he’s grief stricken and threatens the TARDIS keys and all that. Nico gets to say “You betrayed me. You betrayed our trust, you betrayed our friendship, you betrayed everything that I've ever stood for. You let me down!” And Will is grieving and shaking as he asks “Then why are you helping me?” Nico walks up to him and reaches out for him before pulling his hand back, “Why? Do you think that I care for you so little that betraying me would make a difference?”