Ken

Ken's Digimon is Wormmon.
Ken has the Crest of Kindness.
He was the Digimon Emperor until he discovered the truth about the Digital World and found his crest.
His brother, Sam, died when Ken was younger.

Wormmon's digivolution:

• Leafmon-In training
• Wormmon-Rookie
• Stingmon-Champion
• Paildramon-DNA digivolve-Stingmon & Exveemon
• Imperialdramon-Mega-Paildramon