This article is from the Vertigo Comics FAQ, by with numerous contributions by Katie Schwarz kts@socrates.berkeley.edu others.
In Grant Morrison's DOOM PATROL, one of the primary characters was Kay
Challis, a.k.a. Crazy Jane. She was introduced in DOOM PATROL #19, which
was produced in 1988 (it came out in late 1988/early 1989). At the end of
the series she was sane, mostly.
Ragged Robin in INVISIBLES was born in 1988, the same year Crazy Jane was
created (she is a time traveler from the future -- see INVISIBLES Vol. 2,
#6 for her origin); her birth name is Kay, according to Vol. 2 #2.
In response to a letter (vol. 1 #6) asking about the connection, Grant
Morrison replied: "I'm not allowed to answer this one for copyright reasons
(Crazy Jane belongs to DC, Ragged Robin belongs to me), but I'm sure you
thought long and hard about what happened to Kay Challis after she left
Danny the World." Reader Ste'phane Savoie comments, "Admittedly, Grant
could just be being whimsical, but this seems as close to a definite
answer as we'll get."
 
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