Tengu format ruling
The Unhappy Girl

Card effect (current official text)While this card is in face-up Attack Position on the field, this card is not destroyed as a result of battle. (Damage calculation is applied normally.) A monster that battled with this card cannot change its battle position, except with a card effect, or attack while this card is in face-up Attack Position on the field.
Rulings
- The Unhappy Girl's effect only applies to manual changes. You can still change the monster's position with an effect.
- If The Unhappy Girl is in attack position and her controller uses Waboku or Kuriboh to take no damage from the attack, the attacking monster still cannot change battle position.
- If Tyrant Dragon or Hayabusa Knight attacks The Unhappy Girl in attack position, they cannot attack again that turn.
- If The Unhappy Girl is flipped face-down and then flipped face-up again, then her effect is reset and any monsters that battled with her before can change their battle position and attack again.
- If The Unhappy Girl applies her effect to a monster, and Skill Drain is then activated and resolves, and Skill Drain is then destroyed afterwards, then The Unhappy Girl's effect is re-applied and the monster that battled with her before Skill Drain was activated cannot attack or change battle position once again.
- If your opponent attacks your The Unhappy Girl and you use Magic Cylinder to negate the attack, then The Unhappy Girl's effect is not applied.
- If you take control of your opponent's The Unhappy Girl, her effect on your monsters from previous attacks is still applied.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.