<Tr> <Td> Schroeder </Td> <Td> 1951 - 05 - 30 May 30, 1951 </Td> <Td> 1999 - 09 - 12 September 12, 1999 </Td> <Td> A piano - playing character; Lucy's love interest; admirer of Beethoven; Charlie Brown's second best friend after Linus . </Td> </Tr> <Tr> <Td> Lucy van Pelt </Td> <Td> 1952 - 03 - 03 March 3, 1952 </Td> <Td> 2000 - 02 - 13 February 13, 2000 </Td> <Td> Linus' older sister; a bossy, crabby girl who sometimes torments Charlie Brown; and has a crush on Schroeder . </Td> </Tr> <Tr> <Td> Linus van Pelt </Td> <Td> 1952 - 09 - 19 September 19, 1952 </Td> <Td> 2000 - 02 - 13 February 13, 2000 </Td> <Td> Charlie Brown's blanket - toting best friend; Sally's love interest; the most insecure but the smartest out of all the characters, with the most intellectualism; a philosopher and theologian . </Td> </Tr> <Tr> <Td> Pig - Pen </Td> <Td> 1954 - 07 - 13 July 13, 1954 </Td> <Td> 1999 - 09 - 08 September 8, 1999 </Td> <Td> The character who attracts dust, making him very filthy . In one comic strip, Pig Pen is walking with Violet walking behind him . At the end of that strip, Violet says, "Pig Pen, you're the only person I know who can get dirty just by walking down the street ." </Td> </Tr>

What are the names of the charlie brown characters