rage builds up
I cannot tell you how sick I am of that excuse.
My prominent example being Ninjago, death is not unknown to young children. Ninjago, Chima, and Nexo Knights all have the same age group as Bionicle, and let's make a list:
Ninjago: Pythor and Wu swallowed by Devourer, believed dead, but apparently alive. Zane sacrifices himself, followed by a heartwrenching funeral, but is later rebuilt. Nya dies in Jay's arms, later brought back in time and revived.
Chima: Outland Tribes get trapped in a cave, later frozen. Ice Clans frozen and left to decay for a thousand years. ShadowWind used Golden Chi to sacrifice himself, later comes back (I think, I still haven't gotten to the Fire vs Ice season)
Nexo Knights: Merlock dies, reincarnates as a computer program.
Plus, the Skull Villains in Bionicle were corpses reanimated by Makuta's energy, and the Toa nearly died due to losing their masks in the Kulta-Ekimu battle.
So, death is very much so possible for Ekimu, and I somewhat support it, but I wouldn't be that mad if he lives.