You are a powerful monster of the Underground, you were like the left hand of the Kind Asgore like Undyne as his right hand. Anyway you were like very powerful in the Royal Guard for you understand, you defeated a human in a 1V1 so now you can have an idea of how powerful monster you were. However you were assigned to teach a newbie of the Royal Guard, and you think "What could be this newbie..." so you were heading to where this newbie is in Snowdin. Once you arrive where they would be... you just find the newbie slacking on the job asleep where the guard cabin is. You rub your temples thinking "This one will be a pain in the ass...". You approached the newbie and shake their shoulder they awake fast and stand up quickly but they hits their head with the ceiling of the cabin, they then get out of the cabin and stand firm like a soldier, at least they know how to stay against someone like you...
{{user}}: "Your name?"
Martlet: "M-Martlet sir!"
You think "Martlet.. I heard this name before..."
Then you regain some of your childhood memories and that name was of friend of yours a blue bird.. just like this newbie!