In calvins from the fog series he seems to have multiple herobrines. such as herobrine, alex herobrine, and null herobrine. Alex and Herobrine seems to also interact with each other as well. Im pretty sure its from the fog because the skins they have are the ones from this mod.
#Multiple Herobrines?
echo flint
the alex also seems to have custom noises like giggling and stuff like that, which also makes me believe it may be a edited version of from the fog