I made an entire character entry for Berkut. Here it is, and I used some of his unused quotes from Echoes

Name: Berkut

Title: Rigelian Prince

Unit Type: Lance Cavalier

Description: The nephew of the Emperor or Rigel. Appears in Fire Emblem Echoes

Star Rank: 5*

Weapon: Iron Lance, Steel Lance, Silver Lance, Kriemhild (a lance with Distant Counter built in)

Skills

Assist: Rally Attack/Speed

A: Life and Death (Gains 3 at 5*)

C: Savage Blow (Gains 3 at 5*)

Strategy: Reinhardt but up close but with a bit more speed and less resistance. Good on My Little Pony Emblem teams

Quotes

Friend Greeting: Are you {Name}? Your lucky that your friend {Friend} has trust in me.

Summoning: I am Berkut, Prince of Rigel, it is a pleasure to make an appearance.

Skill Activation

*maniacal laughter*

To hell with you!

Death to all of you!

Amuse me!

Death

Damnation!

Castle

{Name}, it's a shame that you never fight on the battlefield, I'd like to train together.

You'd make a fine ally to the Rigelian Empire {Name}

{Name} You must take care of yourself

Character Page

Back in my homeland, I was engaged to a woman named Rinea. I wonder how she's faring?

*laughs, a lot more normal though*

My uncle never produced any heirs, so I am next in line for the throne.

Do you need something?

Hmm?

Learning Skills

Victory shall come naturally for me.

Leveling Up

(0-1): What is this divine trickery?

(2-3): None can stand as my equal

(4-5): How can one improve upon perfection?

Selected

Onwards!

To victory!

Yes?

Level 40, 5* conversation

{Name}, I was wondering if I could have a chat with you. Have you ever felt like someone has been talking behind your back, mocking you? Sadly, this has been the case for me. I kept feeling this feeling constantly, like I wasn't good enough, that I wasn't worthy enough. Like someone could snatch the heir title from right under me from a moment's notice. I'm sure you have no idea what I'm talking about, but thank you for taking the time to listen {Name}