I'm old school? Lol. Maybe I'm just getting old.
Yea the images may basically tell most of it, but Yenny was like the embodiment of every tickler's (ok, well maybe for most men) fantasy of what a ticklish woman was. She was like the fictional version of Julia Parton, except twice as ticklish. A girl that was so ticklish it didn't even matter if a guy liked tickling because every character she would encounter would drive her nuts with no effort and her ending up a convulsing, laughing mess. It was positive material for the community, especially if you were my age and frankly could only find a date BEFORE the girl found out your liking laughing was a way around saying you wanted to tickle torture them.
Eventually after several years of Yenny comics, there were regular, non tickling strips, and then ... There was the stuff for us. To David Alverez (Ozzy), in Yenny there was a barbie like quality role model for young girls, and he basically laid it out that he no longer could allow Yenny to be a tickling fetish icon if the same character was being marketed to young girls (I think in South America). And so we saw her evaporate from media. Ozzy crafted other characters but as far as I'm concerned, there is no character that matches her.