Full Name Halo the Hornet
First Appearance (Alisa's Adventures in Rockoland) Sleepy Time Base
First Appearance (Barney and the Rocko Squad) Barney's Greatest Hits
First Appearance (Xianghua in Rockoland) New Sleepy Friends!
Alisa's Adventures in Rockoland Portrayer Charles Klausemeyer
Barney and the Rocko Squad Portrayer Jason Ritter
Xianghua in Rockoland Portrayer Charles Klausemeyer
"Hold it! My hornet-zzzenzzzorzzz zzzenzzze that zzzomeone izzz getting zzzleepy!"
— Halo the Hornet, before someone falls asleep.

Halo the Hornet, better known as just Halo, is a hornet, hence his name. He is known for his hornet-sensors, which are actually his antennae.

Since he is a hornet, Halo pronounces his Ss as three Zs together. For example, he would pronounce "Alisa Bosconovitch" as "Alizzzzzza Bozzzconovitch".

The following actors voiced Halo: