Meilleur ami and meilleure amie are French equivalents of the English phrase "best friend." Context makes clear whether a female (case 2) or a male (example 1) suits. The pronunciation will be "meh-yuh-ra-mee" in French.
Comment ça va? is a French equivalent of the English phrase "How are you feeling?" when asked of a best friend. The interrogative translates literally by word order into English as "How that goes?" The pronunciation will be "kuh-maw sa va" in French.
"What is the name of her best friend?" and "What is the name of his best friend?" are English equivalents of the French phrase Quel el le nom de son meilleur ami? The question also translates as "What's her best friend's name?" and "What's his best friend's name?" regarding a male friend in English. The pronunciation will be "keh-ley luh no duh so meh-lyuh-ra-mee" in French.
milgiore amico
"Best day ever!" in English is La meilleure journée de tous les temps! in French.
Qui est le meilleur? in French means "Who is the best?" in English.
Beloved friend (or best friend; the verb kupenda can be translated into English as either love or like).
Sei mio amico migliore del mondo
you could say ichiban suki na tomodachi (lit. my number one favourite friend)
Voglio che tu sia il mio migliore amico.
Le pourpre est la meilleure couleur is a French equivalent of the English phrase "Best color is purple." The declarative statement translates literally into English as "The purple is he best color." The pronunciation will be "le poor-pey la mey-yuhr koo-luhr" in French.
Friend in Japanese is tomodachi. Tomodachi
anata WA watashi no ichi ban suki na tomodachi desu (lit. yo're my favourite friend)