Personal pronouns have two forms: free and bound. Free personal pronouns are independent from their preceding word and are used alone. They are comparable to English I, you, they, … Persian is a gender-neutral language. It does not distinguish between masculine and feminine and has one pronoun for English he and she.

من
man
I
ما

we
تو
to
you (informal)
شما
shomâ
you
او
u
he, she
ایشان
ishân
they

Formality

Personal pronouns have formal and informal forms. Plural pronouns can be used as formal form for their singular counterpart:

ما

formal form of من (I)
شما
shomâ
formal form of تو (you)
(Like French vous, Spanish usted and German Sie)
ایشان
ishân
formal form of او (he/she)

Extended forms

The basic demonstrative pronouns آن (ân: that) and آنها (ânhâ: those) as well as proximal demonstratives and emphatic demonstratives, are used as personal pronouns for third person. In practical terms, free personal pronouns are:

من
man
I
ما

we; I (formal)
تو
to
you (informal)
شما
shomâ
you
او
u
he, she
ایشان
ishân
they; he, she (formal)
آن
ân
he, she, it
آنها
ânhâ
they

In spoken Persian, آن has taken the place of او.

In today's Persian, ایشان is mainly used as the formal form of he and she. The normal word for they is آنها, both in spoken and written Persian.

In written Persian, there is also وی (vey) for he and she. It is more formal than او.