Houjuu Nue is in the middle of the bottom row, no idea who the guy is.
It's Professor Monster from Toei's Spider-Man series. Not sure if he has another tag here or if this really is the only image of him on Danbooru.
HappyTouhouToeiMadMiserableIn painCrying aloudBluffingSurprisedMovedDidn't knowPuzzledSavage hawkSlithering snakeConfessingSleepy"Why?"Mixed feelingsBitter*sparkle*Drinking prohibitedShockHiding embarrassmentSchemingPoutingEnlightened
the word used here for "enlightened" is pronounced "satori"FoundPrideTense"I'm beat"AnswerColombiaContemptSneeringForgivenessAnticipationIt's expiredSmilingWorriedExasperatedDispair