The Nocturne Princeps (ノクターン族 たいちょう Nokutān-zokutai chō?) is an enemy that appears in Sonic Chronicles: The Dark Brotherhood. They are a unit of echidna soldiers from the Nocturnus Clan who were banished to the Twilight Cage.
The Nocturne Princeps' basic attack is forming a pair of blue spears of energy, similar to the Chaos Spear, and throwing them at the opponent, which can deal two hits per use. Their POW moves are Regenerate (じこかいふく Ji ko kai fuku?) and Leech Blade (ドレインブレード Doreinburēdo?, lit. "Drain Blade"), which can inflict Leech.
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- The word "Princeps" derives from the singular form of the Latin word "Principes" which refered to spearmen, and later swordsmen, in the armies of the early Roman Republic. These people were men in the prime of their lives who were fairly wealthy, and could afford decent equipment. They were also the heavier infantry of the roman legion who carried large shields and wore good quality armor.
- The Nocturne Princeps have the same character model as the Nocturne Triarius and the Nocturne Hastatus.