Disclosed are azaindazole compounds of Formula :or a pharmaceutically acceptable salt thereof, wherein: X is O and Y is N; or X is S and Y is CH; Z is CR2 or N; Q is a heteroaryl; and R1 is defined herein. A difference \u03941 between a solubility parameter value A of the fibrous structure and a solubility parameter value B of a particle surface of the electrophoretic particle is 2 or more and 5. The juvenile seat includes a first pair of openings and a second pair of openings.