In one of the earliest chapters, Ami contacts an unscrupulous merchant to buy supplies. At first, he rejoices when he notices her youth and inexperience, figuring he can overcharge her. Then she survives a fight with the reaper, and the latter suffers through the effects of her Sailor Mercury transformation...
Nicodemus nodded dumbly. No surcharge for her, no. He did not want the ire of anyone who could fend of the Reaper and not even look bedraggled. That appearance had to be a glamour. What he caught a glimpse of next through the passage behind the Keeper had him gaping in shock, mouth open like a fish. The Horned Reaper, angrily ripping off a miniskirt just like the one the girl was wearing? A blue bow was waving behind the terrifying red figure like a flag, held in place only by a single thread. Were- were those earrings? LIPSTICK?! Forget about no surcharge, bring out the Valued Trusted Customer Please Don't Kill Me Discount. Whatever could do something like that to the Reaper had to be a horrible, powerful nightmare in disguise.
The exchange following Ami ordering the Horned Reaper in her first battle.
"A Reaper... she can summon a Reaper. That girl is a disaster waiting to happen."
"What the Hell were you thinking summoning THAT!?"
"To be honest, it was something along the lines:"A Goblin won't do."
"The sacrifice of many chickens in the name of science would not be in vain!"
Why the Underworld has a fashion consisting primarily of leather.
Rabixtrel, a HornedReaper is given the task of killing all undead on a large continent. Some time later, Ami checks up on him while giving the other Senshi a tour of her realm via crystal ball...
Startled, Ami looked at the orb instead of heeding the warning. She saw movement reflected in its curving glass, but before she could react, something huge and menacing was behind her. Muscular arms that felt as if they were made of steel wrapped around her with crushing force, pinning her arms to her sides.
"Eeep!" Ami screamed in surprise as she felt herself lifted off the ground and twirled around in a circle, her legs almost horizontal from the centrifugal force. An instant later, her assailant let go, and she dropped back onto the ground, her knees wobbly. Eyes round and hair standing on end, Ami whirled around just in time to watch Rabixtrel jump off the cliff and resume his chase.
"What was that all about?" Sailor Mars demanded to know.
Gulping back in the air that had been driven from her lungs by the bone-crushing hug, Ami shrugged her shoulders and blinked in confusion. "He's - happy, I think?"
When Mukrezar is caught up to speed by his imp butler on events that happened in his absence, especially his changing opinion of Mercury.. And the next scene with them. And the one after that. Basically any scene involving Mukrezar and his imp butler.
From 168: Unwelcome Surprises
Mukrezar: "You tried to attack the Empress and she set you all on fire again, didn't she?”