Cardfight!! Vanguard S04E03 - Aichi's Shadow

Only Kai, Naoki, and Misaki remember Aichi and they vow to find him, but are stumped. But then Morris, an enigmatic steward, appears in front of Naoki. As Morris engages in a Cardfight with Naoki, he tries to use the latter`s anxiety to win the fight and throw him into despair. But who is Morris and his unseen master?