Marlon has over 100 lines of dialogue. Here are some selected quotes:
Regular
Spring, Wednesday, with 4 hearts
「I scout the mines several times a week, trying to gauge monster populations. Wouldn't want too many of them grouped up. They could start trickling out of the caves into the valley.」
Spring, Sunday, with no hearts
「Sword, dagger, or hammer? The weapon you choose dictates your fighting style. I prefer swords. Short range on daggers gets me too close to monsters for comfort, and hammers slow me down.」
Spring 23rd
「Hmm? What's that? Yes, I'm aware the flower festival is tomorrow. My attendance was requested by Mayor Lewis.」
Summer, Thursday, with no hearts
「Guild used to be a lot bigger. Stardew Valley wasn't always as 'monster-free' as it is now. Rasmodius played a big part in the security here.」
Summer, Saturday, with 6 hearts
「During the time I've spent traveling and fighting monsters, I've come across many interesting people. Some of the most interesting are here in this valley. Including you, of course.」
Summer 10th
「Still need something to drop into the festival's soup, [Farmer]? I wonder how the soup will turn out tomorrow. Perhaps the cave carrots I dug up would make a good addition?」
Fall, Monday, with 4 hearts
「Find yourself a trusty weapon and take enough supplies and there's nothing you can't tackle. You're shapin' up to be a fine adventurer, [Farmer].」
Fall, Thursday, with 6 hearts
「Hope you're taking enough precautions down in the mines, [Farmer]. Last thing I need is another spot to visit up on the summit. Crowded enough up there already.」
Fall 15th
「Heard news from Mayor Lewis. There's many tourists visiting Pelican Town tomorrow for the festival. I get nervous around large crowds.」
Winter, Monday, with 6 hearts
「Gil and I have known each other for a long time. Been through lots together. Good friends are some of the best things to have, in this business. You can watch each other's backs.」
Winter, Thursday, with 6 hearts
「Silence of winter is mesmerizing. I enjoy taking late night strolls in the dead of night, nothing lighting my path but my lantern.」
Winter 7th
「I object to the town's ice festival gathering every year. The magic barrier that far out in the forest is weak. Monsters could slip through. I'll be keeping close watch. Don't worry.」