L uses a famous pop star's name as his alias specifically so that if Light tries to write that name in the Death Note while thinking of the person in front of him, the real pop star would die instead, immediately proving Light is the killer. Character Dynamics and Themes
The direct interaction forces viewers to compare the two "geniuses" and their conflicting views on justice. Death Note Episode 9
Ryuk continues to find the human struggle hilarious, particularly noting how rare it is to see the usually composed Light so visibly panicked. L uses a famous pop star's name as
The episode highlights the high-level intelligence and tactical thinking of both protagonists: Death Note Episode 9