Context: When Gura and Amelia were visiting the Hololive JP server they met Aqua outside her home, which has a lot of berry bushes out in front of it (which have thorns that do damage in Minecraft). Gura jumped into Aqua like a puppy and pushed her into the bushes, and she died after a few seconds. Gura was mortified. Aqua laughed about it later.

While the freakin shrub got the kill, the shark instigated it~

"Apex predator viciously kills her senpai on the first meeting."

Clip: Aqua talks about she got killed by Gura in the first contact

9k old apex predator first blood faster than lion.

It was in front of old Shion's house, not Aquas.

While her death was pretty funny, but before Gura's push Aqua did move through those sweet berry bushes for a long time so she has almost no hp left when she got push.