Which Fire Emblem Characters should leave Smash?

This video is my first discussion video. It took about a month to make, and it's a bit awkward, but I'll improve.
Which Fire Emblem Characters should leave the Super Smash Bros franchise if the roster gets cut in the next game?

00:00 - Intro
01:17 - Pre Analysis
03:38 - Fire Emblem Characters
06:25 - Lucina
09:42 - Chrom
11:17 - Roy
12:50 - Byleth
14:07 - Corrin
17:45 - Ike
19:03 - Robin
19:20 - Marth
19:50 - Improvements
23:18 - Outro

Music in this video:
Deltarune - Faint Glow
Sonic Adventure - Blue Star ...for Casinopolis
ARMS - Cinema Deux Theme
Super Smash Bros Ultimate - Fire Emblem Theme (Heroic Origins)
Super Smash Bros Brawl - With Mila's Divine Protection (Celica Map 1)
Fire Emblem Awakening - Id (Purpose)
Fire Emblem Heroes - Path Of Greatness (Binding Blade)
Fire Emblem Three Houses - As Swift As Wind
Fire Emblem Fates - Far Dawn (Calm)
Fire Emblem Radiant Dawn - Eternal Bond
Fire Emblem Awakening - Duty (Ablaze)
Fire Emblem Fates - Desire Below (Calm)
Fire Emblem Fates - Quiet Burn (Calm)

Credit to Nintendo for most of the music in this video.