Latin personal pronouns are: ego (I), tu (you), nos (we), vos (you all). They have a very specific declension. The pronouns ego and tu:

case	1st person	2nd person
nom.	ego	tu
gen.	mei	tui
dat.	mihi	tibi
acc.	me	te
abl.	me	te

As the pronoun of the 3rd person (he, she, it, they), the word is, ea, id (in plural: ii, eae, ea) is used.

The pronouns nos and vos:

case	1st person	2nd person
nom.acc.	nos	vos
gen.	nostri, nostrum	vestri, vestrum
dat.	nobis	vobis

The reflexive pronoun se (oneself) has a declension similar to ego and tu, but no nominative form :
gen. sui
dat. sibi
acc. se
abl. se