The companion to Dragon’s Keyperson.

Dragon’s Defender
EARTH/Dragon
Level 2
300/700
[Requirement] If there is an Attack Position “Dragon’s Keyperson” on your field, you can send 1 card from your hand to the Graveyard.
[Effect] Choose 1 Attack Position “Dragon’s Keyperson” on your field and 1 Attack Position monster on your opponent’s field, and change them to face-down Defense Position.
-Rush Duel-

Source.