Recode DNA is a feature in Terra Battle that can be used to upgrade certain characters to Lambda (Λ) characters. Characters are promoted to a higher class and have a higher stat cap. They will start at level 1, regardless of their level before recoding. Recoded Adventurers will have only one job while monsters will have three (it is the other-way-round before recoding). 

These characters are considered a separate unit, usually with a different character profile that may or may not have references to their pre-recode histories, and may be owned alongside their non-recoded versions. 
recode (terra battle)