- This monster is the same as "Great Shogun Shien" and "Tenkabito Shien", as supported by the Master Guide 3 card storylines. But for some unknown reasons, "Legendary Six Samurai - Shi En" is DARK-Attribute while the other 2 monsters are FIRE-Attribute.
- The "Shi En" instead of "Shien" is explained by the fact that in the Japanese card, the name "Shien" is written only with katakana "シエン" while on cards such as "Great Shogun Shien" or "Tenkabito Shien" it is written with the kanji "紫炎" with furigana "シエン".
- "Shien" means "Blue Flame", while the other spelling, "Shi En", can be translated as "Death Flame".
- This monster appears in the artwork of "Six Strike - Triple Impact".
- This monster's armor appears in the artwork of "Shien's Scheme".
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