It may not be easy to translate the verb "hope" into good Japanese.
But I'd think "...(da)to ii (desune)" could be used in most cases.
For example:
I hope that Mr. Smith is nice.
スミスさんが(/は)いい人だといいです(ね)
I hope that the train comes today.
(その)電車が今...
Oh, I'm sorry! My bad; I thought the anime in question was Witch Hunter Robin, because I googled "Witch Hunter" and the only answer was that one. I had to look for the Spanish title you gave me in order to find the right anime...
Anyway, let's ge...
The song is called Hikari no Yukue, its from the anime called the Witch Hunter or El Cazador de la Bruja which is its spanish name (a lot of the scenes take place in Mexico), but these are the lyrics to the song
Yaketsuku hizashi no? moto kimi wa...
Sai, I don't know if that's the song you were talking about, but here's the transliteration into Romaji and its meaning in English of the opening song for Witch Hunter Robin:
http://www.animelyrics.com/anime/witchhunterrobin/shell.htm
Only one t...