Ashina: The Red Witch (UP)

This is the first bonus ending of the game (known as the Tena ending), it requires you asking certain questions and performing certain actions during the chapters of the game. They are:

• Beginning - ask Tena about her dream after you bring her a soda
• The Bathhouse - when you first see Tena in the sauna, ask her about Yoko
• The Bathhouse - after Tanto comes to rescue you, walk over to the sauna where Tena was
• Blood And Water - when you enter the shower room, examine the locked door to the sauna where Tena is

You'll know you've gotten credit when you hear a bell chime sound effect after asking these questions / doing these actions.

If you've been following my solutions, this is done in The Road To Nowhere chapter. Once you've gotten the sauna key:



Return to the shower room and use the sauna key on the sauna door door. A long cutscene will play, during which the "Cold waters." achievement will unlock.

The "Of Blood and water." achievement will pop shortly after this, followed my "My Big Sister" and "Another chance".