During Defender of Varrock, Simon is questioned on zombie sightings, and will point the player towards the Chaos Temple Dungeon after angrily deriding the zombies for not being team players as they refused to purchase his wares.[1]
After the Wilderness Improvements & Task Set update, Simon may now also be used as a bank.
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Load Last Preset options have been added to a range of "banks": Burgh de Rott repaired bank booth, both Player Owned Farm upgraded bank chests, the opened Oo'glog bank booth, Player Owned Ports bank boxes, the Artisans' Workshop bank chest and Wilderness Cape Sellers.
During the event Zodiyak Track, you could give him 28 astral runes as a part of the track challenge called "All the lights in the sky are stars". This is a reference to a 2007 anime titled Tengen Toppa Gurren Lagann, both an episode title ("All The Lights In The Sky Are Stars") and the main protagonist (Simon).
^Simon, "Defender of Varrock", RuneScape. "Don't talk to me about zombies; There's been far too many around these parts and not one of them wanted to buy a cape. They're not team players, these zombies."