@jokerxhisoka He was touted as the perfect "guide class".
If you've played older Fire Emblem games, the trope is mostly known from there. A highly ranked unit that assists you in battle early on but due to them starting off in a high rank, their growth over time compared to those who start from 0, is real lacking.
Think of it as if someone who starts at max level 50 with 50 points in every stat vs someone who starts at level 1 and gets 3 points in every stat per level till 50