Honestly Mr Trichs that probably depends on how blazed you wanna get. The coconut cream is quite fatty and does not disrupt the gel. As long as it's largely water by mass and well emulsified before setting should be fine.
Note this is like very soft, um here we would call it jelly. I think in the usa it's maybe Jello? A dilute gelatine and sugar preparation. If you wanted to be able to pick it up/be more rough you may want to raise agar to ~0.5%?
It isn't chewy like a gelatine gummy.
I haven't characterised it but since it's agar that's making the basic gel it seems to still have that hysteresis. I just blasted some in the microwave till it felt hot (est 60 degrees?) and it stayed solid.
If you tried injecting a fluid into the middle it would probably tear, but if you set it around a form you could fill it. You might have problems getting a cap to stick to the hole opening though.