Too-Ticky is active, optimistic and interested in all things. She is seen as very knowledgeable, practical, and wise, and is a good problem solver. She has a major role in some comic books and newspapers and books, The Magic Winter, but does not appear in all the Moomin books. She doesn't hibernate during the harsh winter. Too-Ticky's outfit is a red and white striped sweater and a red bonnet (blue from the inside) with a red pom.
Her first appearance is in Moominland Midwinter, where she teaches Moomintroll about winter when he wakes up during hibernation. She is also featured in a short story in Tales from Moominvalley, and in The Dangerous Journey, where she pilots a balloon.
In Moominland Midwinter, Too-Ticky together with Moomintroll and Little My build a horse out of snow for the Lady Of The Cold. Little-My definitely wanted to see the Lady up close, although Too-Ticky warned her against her icy gaze. Too-Ticky also warned a little squirrel, who forgot her warning and the Lady's gaze froze him.
- The Invisible Child (Moomin -1990 Episode 9)
- The Invisible Friend (Moomin - 1990 Episode 10)
- Moomintroll and Little My's Winter Adventure (Moomin - 1990 Episode 21)
- The Winter Visitors (Moomin - 1990 Episode 22)
- Midwinter Bonfire (Moomin - 1990 Episode 36)
- The Memoirs of Moominpapa (New Moomin 1972 - Episode 13)
- Pointless Disturbance is Pointless (New Moomin 1972 - Episode 15)
- The character and her name are modelled after Tuulikki Pietilä, author Tove Jansson's wife/life partner.