2008 October 30, Galen, “Re: Japanese launch campaign to marry comic book characters”, in rec.arts.manga, Usenet:
So long as I get to claim my virtual waifu and our 30 virtual children as tax deductions, I don't really care if I can't touch her.
2009 December 31, Dave Watson, “Re: K-ON! 2nd season announced”, in rec.arts.anime.misc, Usenet:
Seriously, it was fun, but here's hoping that they lay off some of the bits that got old real quick, like Mio getting scared easily. I would not like to have someone that timid as "mai waifu" (as if I'd marry a bloody high school girl anyway). Makes me wonder what that says about the otaku who worship her.
2010 March 26, Untergrundkoenig [username], “Re: 49 Spring Anime -- full previews, w/staff, cast, story, images, trailers”, in rec.arts.anime.misc, Usenet:
Ritsu is my Waifu *_*
2012, Dani Cavallaro, Kyoto Animation: A Critical Study and Filmography, McFarland & Company (2012), ISBN9780786470686, page 126:
Bradley Meek's portrayal of Lucky☆Star's protagonist is particularly worthy of notice in assessing the anime's take on the art-play dyad: “Konata Izumi is a high school otaku hardcore enough to know trivia about seventies giant robot and tokusatsu shows,” the critic proposes, “but not hardcore enough to own a bodypillow of her waifu [a 2D significant other]. […]