Schroeder (Peanuts) and Lucy and Snoopy comes out of nowhere and starts dancing on the piano, until Schroeder and Lucy start looking at him angrily and Snoopy stops dancing and looks embarrassed. Frieda sometimes leans against Schroeder's piano, making Lucy jealous. She does not seem to be much of an annoyance to him as Lucy, but Schroeder prefers Lucy over her, possibly because Frieda has no knowledge of classical music at all (in "Play It Again, Charlie Brown" she thought Beethoven was a drink, causing Schroeder to pull the piano out from under both her and Lucy). The piano's capability is illustrated
Schroeder (Peanuts) and Schroeder feels he must emulate every aspect of his idol's life, even if he reciprocates Lucy's feelings. In a story arc where she and the rest of her family have moved out of town (also seen in the TV special "Is This Goodbye, Charlie Brown?"), Schroeder becomes frustrated with his music and mutters disbelievingly that he misses her, realizing that, despite his animosity toward her, Lucy has unwittingly become Schroeder's muse and he cannot play without her (he parodies Henry Higgins by saying, "Don't tell me I've grown accustomed to "THAT" face!"). Sometimes he gets so annoyed with Lucy