The main character: who is he?

In this book the narration is provided by the first person called Jay (it is Jerome K.Jerome himself). He has an ironic attitude to every situation took place in his life. Jay even mockes his friends when they do something wrong, however it is neither rude and offensive jokes nor sarcasm. His humour is as mild and gentle as his character. This man has no wish to injure people because he is  kind-hearted and sentimental. There is not a detailed description of his appearance but evidently it is not important to understand that he is an attractive person. I have already liked him only for his handsome nature and great jokes.