The Relic variant of Squire Rel, he has 50,000 health and has a strong attack dealing 12,500 damage per hit. He's faster than the original with more knockbacks. He attacks much faster with an attack animation of 6f, meaning that this enemy does 28,846 damage per second. Beware Sir Rel in 2★ as well, as there, he will have 75,000 health, 18750 damage per hit, and an incredible 43,269 damage per second.
This enemy is very deadly for a peon; with a massive DPS of 28,846 and a tendency to be spammed, he can cut through your defenses with ease. However, it only takes 10,000 damage to knock back this superpowered squirrel. Furthermore, it drops nearly no money.
In some levels, Sir Rel shows up to assist enemies that you essentially need to use status effects to beat, such as Bore, and in those kinds of levels it is recommended that you use a wave attacker or a quick-attacking Area Attacker such as Slapstick Cats to deal with them.