You can find someones profile by clicking on the first letter of their username then selecting their name from the list

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kaila
Kali
Kate
Katharine Wade
katie
katie87
katied
KaTiEStar
KazJo
Keenangel
Kelly
Kelspook
kenfan24
kenneth
Kenneth M. Jasch
Kerr Avon
Kevin
khards
kieran
kieran82
KieranFrost
killer
killercoyote
kim
Kippa2k2
kitcat
Kneon Light
Koala
kool dude
Korrigan
Kristopher
kulit
kytran