Other than with Spar, after uniting it/him with the water shaman.
This has to do with Algernon. When you go to get the owl fruits you must first pass through a house where hunters usually live. But at this point in the game they have vanished, supposedly because of Algernon. But the last entry in the diary (belonging to one of the hunters) is evidence that whatever happened when they were lured to Algernon made it possible for one of them to still be able to make that entry into their diary after whatever happened to them.
The hunters, I gather, are all male. Algernon, at least in part, is a beautiful girl whose songs lure people to her. (I have no idea if it has any real hypnotic or enchanting effect on one or both sexes, but the hunter's diary entry does specifically suggest covering the ears.) The question is... What happened to the hunters? Where did they go if they didn't die? Well, Algernon is also accompanied by other beautiful (I'm assuming) girls (who aren't connected to big, ugly heads), who it/she summons into battle. What is interesting is that there are more of these girls that enter the battle when either of the two initial entrants are killed.
Here's my theory... Algernon has to get these other girls from somewhere, right? And the hunter's didn't die. So, the hunters became these girls. However, since they never left, it would seem like Algernon has some form of control over them, in that they maintain their free will so long as they stay within the area, or until the case of Algernon needing them.
What do you think?