Chem!Zim is an actual human, so i think that deep down he's just lonely. (i may or may not use it in Chemicals but.) and i guess ToD!Zim is fairly nice to him cause... they're both Zim? i mean he obviously has a fondness for himself right?
wow i drew out that /entire/ conversation i am so done.
ToD, Chemicals (c)
Invader Zim (c) Jhonen Vasquez
really I see it like
human zim-I I I AM A ALIEN AHHHHHHHHH
alien zim- sigh you sound like the dib worm
human zim- HA I HAVE NO IDEA WHO DIB IS SO HA wait you where not sent by my cousin red right cause if you where I am gonna ugh
alien zim- almighty tallest red huh?
human zim- almighty my foot he's a jerk
alien zim - Y Y YOU LIE YOU LIIIIIIIIIIIE