Kabr, also known as Kabr the Legionless, was a legendary Titan who, long ago, ventured into the Vault of Glass. He did not succeed in his efforts. In his last moments, he created the Aegis. One of the first areas of the Vault was named in his honor.
Any Titan brave enough to venture into the Vault may be lucky enough to find Kabr's old gear. He also carried a pocketwatch.