In Lowood, Jane Eyre and Helen Burns were the best friends. Helen was younger than Jane and was considered to have all the goodness of the fundamental Christian principles.
With the death of Helen came a shock for Jane as she thought that Helen was extremely good for this world and that she will not be able to survive now. Therefore, it symbolizes innocence for Jane.
Since misery and depression are both sad/bad kinds of feelings, then we have to find a pair of words that have the same kind of feeling in order to complete this analogy. The correct answer should be melancholy and boredom.
