I never bothered to dig into how the thing with religion and beliefs is like in Japan, but I think she follows the majority. Doesn't seem to me like she's Christian, despite she recognizes Christmas holiday (probably like majority of Japanese) and makes references to Christian symbols, themes.
__________________
Ayu is 贅沢「zeitaku」 Luxury | 誘惑「yuuwaku」 Temptation
爆発「bakuhatsu」 Explosion | 化学「kagaku」 Chemistry
夢中「muchuu」 Craziness | 伝心「denshin」 Telepathy | 青春「seishun」 Youth
|