In recent times, there's been a little confusion in how we write plots in episode articles and biographies in characters' articles. Both are entirely different to each other. Plots, because they are read as the story goes on, must be written in the present tense. However, characters' biographies are like looking back in time at a certain occasion in their lives. This must be written in the past tense. Whether it is different on another wiki, it doesn't matter, this wiki considers it this way.
If you have any further questions about editing, please consult me on my talk page - I'd be happy to help!