Note: For the sake of clarity, whenever a character is in their transformed state, their name will be given in italics.
For example:
Helga G. Pataki = Helga
Sailor Moon = Helga
The girls all sat solemnly in a circle in Helga's room, with Diana taking up the space in the centre. Liam sat quietly on the bed, in silence.
"Wow," said Rhonda. "I can't believe that this is it."
"After all we've been through," continued Phoebe. "It could finally be over."
Lila winced at the word 'over'.
"Come on, you guys," cautioned Patty. "Show some sympathy. This isn't exactly an easy thing for all of us."
"That's right," agreed Diana. "In case you've forgotten, we're asking someone to risk their life to save this city."
"Not only that..." all heads turned to look at Liam, who took to looking vacantly out the window. "But all of you. You'll be risking a great lot as well. I know my dreams. They're not safe. Some of you may..."
Helga snorted audibly, interrupting Liam; she stood up to make her point heard. "Look – we're no strangers to danger. We've been smashed, beaten, burnt, drowned...we've suffered unbearable pains, both physically and...and otherwise. But in the end, we've always come out in one piece."
"Do you really believe that?" asked Lila.
"Absolutely. It's an in-and-out operation. Nothing's going to go wrong."
The door opened unexpectedly, and Diana shot under the bed. Liam disappeared into shadow and stood in the darkened corner of the room.
"Olga!" said Helga angrily. "Criminy, ever heard of knocking?"
"I'm sorry," Olga said at the entrance. "I hope I'm not disturbing anything..."
"Well, you are, so can you come back a little later?"
"Actually, I think we're done here," said Lila. "We'll talk again tomorrow. There are some things I need to take care of."
"Me too," said Patty.
"I also have some unfinished business to attend to," said Phoebe.
"See you tomorrow, Helga," said Rhonda, who was the last of the girls to leave the room (Diana quietly trailed behind). Liam nodded furtively to Helga, then vanished completely out of the room. It was just the two Pataki sisters alone now.
"Well, if you're done barging in and interrupting us, I've got chores to do..."
"Helga..."
"What?"
"I heard you, Helga."
Helga froze mid-motion to her closet. "H-how much did you hear?"
"Enough. Is Hillwood really in danger of...?"
"...Yes."
"And you and...and the other girls are the only ones who could stop it?"
"This doesn't concern you, Olga. So don't try to talk me out of it or try to guilt-trip me because I'm your baby sister or..."
Suddenly Helga was caught in an embrace. As usual, Olga's mascara was running from the tears.
"You're my sister, Helga. But you're not a baby anymore."
"Uh, Olga....?"
"I believe in you, Helga. I know what you're capable of. And I know that...despite everything that you've been through...you'll do what needs to be done."

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Sailor Helga 🌙 | A Hey Arnold! / Sailormoon Crossover Fanfic
Fanfiction*#1 IN #HELGAXARNOLD TAG FOR APRIL 2021* Helga, Phoebe, and Rhonda meet with Luna the cat, who gives them powers to become Sailor Scouts. Also, why does that masked football-headed kid look familiar...? Later on, Lila, Big Patty and Diana the cat jo...