Ascoeur is the protagonist of Kiddy Girl-and. Her real name is Lieselotte Rosenburg
Relative to the series' predecessor Kiddy Grade, she retains elements of Éclair's personality: her recklessness and simple nature, in addition to being spastic and childish.
While she and Q-feuille are ES member candidates, they are currently waitresses for the Touch & Go! cafe within the GTO headquarters. She is also known to have a strong love for pumpkin pudding, to the point she would break into the GTO to get some. It is later revealed that her real name is Lieselotte and that Geacht'er is her biological brother, as they share the same rose birthmark, the thought of which has cause her to be very depressed. In episode 21, she freed Q-feuille from her brainwashed state through resonance amidst a kiss. (The resonance was strong enough to overpower "Geact'er's" ability.) In that same episode, Ascoeur's past was revealed. She, as Lieselotte, was a member of the Nouvlesse and was imprisoned with her brother in an experimental facility when the universe was to become a democracy; members of the Rosenburg family who committed genocide rather than be ruled under the commoners. When their powers first manifested right before she was about to be crushed, she ended up in a cryogenic chamber and was separated from her brother, however lost all of her memories up till that point.
Her special ability, "Push-Pull," is teleportation. She has inherited Trixie's ability to bend space. While powered-up by Di-air's kiss she is able to teleport further, faster and while carrying multiple bodies, however later on has shown she has gotten stronger with her ability to where she doesn't need to kiss Di-air to teleport other people.
- Her name is French for "Ace Heart", shown where her pigtails are formed into the shape of small hearts.