Bernkastel

Bernkastel is a old witch and main antagonist of Umineko no naku koro ni series.

History
Bernkastel is the cruelest witch of the universe and she is a voyager a type of witch that can travel by other universe altenative. She is also known for being the most powerful witch in the universe. She also came across her then friend Beatrice and her game she decided to stay and play to relieve her tedium.

Personality
She enjoys the aesthecism of human, she likes wines and spyce food and does not like people who do not learn.

Although she has a cute appeareance and a cold, emontionless personality, she is shown to fully sadistic and cruel being able to use either so for your enjoyment. It is equally or more cruel than Lampdadelta showing affection for her and said love several times.

Origens
The origen of Bernkastel is unknown but perhaps suggests that it is Rika Furudo a Higurashi character since both have similar personalities and appearance and also both Higurashi and Omineko are part of the same universe.

Trivia

 * The appearance and mannerism are very similar to Rika Furudo a character of Higurashi who is the main protagonist of the series.
 * It was mentioned once that when Rika died in the other altenate universes, so a piece of energy was joined and created Bernkastel.