beholder(n = noun.person) observer, perceiver, percipient - a person who becomes aware (of things or events) through the senses; Array
is a kind of individual, mortal, person, somebody, someone, soul
has particulars: eyeglass wearer, discoverer, finder, spotter, attender, auditor, hearer, listener, audile, motile, noticer, seer, looker, spectator, viewer, watcher, witness, visualiser, visualizer, informant, witness, witnesser
Derived form verb behold₁

   One who beholds; a spectator. [1913 Webster]

N  spectator, beholder, observer, looker-on, onlooker, witness, eyewitness, bystander, passer by, sightseer, rubberneck, rubbernecker, spy, sentinel.