I finally figured out a conversation for Twily and Spikywikey.

T: “A…ahaha, there are two Spikes…Hahaha ‘spikes’. Come join me Spikes! The more the merrier!”
S: “Twilight, I…think you have enough.”
T suddenly teleports to S and corners him with her arms
T: “Youuuu don’t wanna join me?”
S: “No, I’m a minor, I can’t drink!”
T: “….” stareeeee
S: “What?”
T: “Now that I have a good look at you…You look more like a man compared to before….”
S: “Really?”
T: “Yes. You’re a lllllllllllllllittle grown up now….”
S: “Of course! I’m a young dragon with room to grow!”
T: “….so…what are you hoarding this time, huh? What triggers your sense of possessiveness? Hmmmmmmmmm????”
S: gulps

On another note, this will be my default Spike, Humanoid variant of Dragons. So he looks like a mix between lizardman and dragonewt. Fantasy tropes, man.