- "Celtic Guardian" has a retrained counterpart, "Obnoxious Celtic Guard".
- This card appears in the artwork of "Triggered Summon" and "Summoning Clock".
- The Bandai version of this card has 1300 ATK, 2200 DEF and 5 stars, the Konami version has 1400 ATK, 1200 DEF and 4 stars.
- Celtic Guardian resembles the Nintendo character Link from "the legend of Zelda". They both are elves with a sword, both wear green and they both have blonde hair.