Does Wielder of Water count as alone when a hidden card is at the same Battlefield?

Ruling: Wielder of Water counts as alone when a hidden card is at the same Battlefield because hidden cards technically don't exist until revealed.

Sequence:

• While the card remains hidden, Wielder of Water maintains its alone bonus
• When a hidden unit is revealed, Wielder of Water immediately loses the alone bonus
• If the hidden card is a spell (not a unit), Wielder of Water keeps the alone bonus even after revelation

Nuances:

• This applies even if the hidden card is a unit like Paaka Cub
• Only revealed units cause Wielder of Water to lose the alone status
• Revealed spells do not affect the alone status