Interpreting The Ending... (Spoilers)
*Spoilers Throughout This Discussion*
The ending of the film remains rather ambiguous as the final shot of the film shows Suma resting her head on Aku's shoulder. Aku is holding a photo of the two of them that the police retrieved from the body of the killer, a woman who was Aku's patient (unfortunately her name escapes me at the moment). However, at the film's last moments, the music ends abruptly leaving the scene in dead silence. Aku looks up from the photo and smiles sinisterly at the camera, just before the entire screen abruptly cuts to black and the credits roll.
I am not sure how to interpret this conclusion. I personally deciphered it as possibly indicating to the viewer that Aku had, in fact, been manipulating everyone the entire time (his patient, Suma, etc.) and that he had orchestrated the murders as well, all in an effort to reunite himself once again with Suma (which he accomplishes in the end). Of course, I may be incorrect, considering that this is merely a hypothesis.
So, I was wondering how other viewers may have interpreted this rather questionable and enigmatic final image... What are your takes on the conclusion of the film's narrative?