Spoiler — from the ending. Tap to reveal.
“I can endure, if I'm with you. Even if we're burned in the flames of hell.”
2 quotes from Sailor Moon, each with commentary on what it means and why it stuck.
“I can endure, if I'm with you. Even if we're burned in the flames of hell.”
“Anyone's heart would grow cold if they were alone.”
Taken by itself, this is less Michiru's line than her turn in a relay. Mamoru and the nine Guardians pour their power into Usagi, and the transcript hands each of them one sentence in sequence: Mercury tells Nehelenia not to be afraid, Uranus that she is not alone anymore, Mars asks her to open her heart. Pull any one of them out and it reads like a card from a gift shop. Concede that, and Michiru's sentence still differs from its neighbors. It is the only one that explains instead of pleading. Nehelenia has just said that before the mirror she had no one to share her joy or her sadness with, and Michiru answers with a diagnosis, delivered as coolly as a weather report. That is in character for the Guardian who, in the Sailor Moon S battle against Pharaoh 90 as the same page transcribes it, told Sailor Moon that Hotaru was gone and to save the rest of the world instead. Michiru does not do comfort. She grants that the coldness had a cause, which is as near to forgiveness as she gets, and the line is better for being hers.
The usual reading files this as the couple's love line, and the scene does give them that. But Michiru is answering something specific. Galaxia has just taken their bracelets, and Haruka says they will be answering for their sins forever, after a mission they kept from the others that left Usagi believing, as she sobs in the same scene, that they had turned against everyone. Michiru does not argue with the verdict. She accepts the damnation and asks only to share it. The tender line in the exchange belongs to Haruka, who answers "Hell, huh? It doesn't suit you." That refuses the premise on Michiru's behalf, which is a greater kindness than agreeing to burn beside her. One fact about English matters here. This scene never went through the 1990s dub that rewrote the two as cousins, because Sailor Stars had no North American release until Viz, which Anime News Network reported would keep the original relationships. Their last scene reached North America in English through Viz first, and so arrived with them as what they are.