Pronouns (in tabular form).  See pronouns for a few examples.

​person	Subject	Prepositional (after para, etc.)	Reflexive	Direct Object	Indirect Object
singular
1st	yo (I)	mí (me)	me (myself)	me (me)	me (to me)
2nd	tú (you fam.) / vos†	ti (you fam.)	te (yourself fam.)	te (you fam.)	te (to you fam.)
3rd	usted (you) él (he, it) ella (she, it)	sí (himself, etc.)	se (yourself,     himself, herself,     oneself, itself)	lo (you, him, it) la (you, her, it) le (him, usted)††	le (to you, to him,     to her, to it) (Changes to se before lo, le, etc.)
plural
1st	nosotros (we)	nosotros (we)	nos (ourselves)	nos (us)	nos (to us)
2nd	vosotros (you fam.)	vosotros (you fam.)	os (yourselves fam.)	os (you fam.)	os (to you fam.)
3rd	ustedes (you) ellos (they) ellas (they)	sí (themselves, etc.)	se (yourselves,     themselves)	los (you, them) las (you, them)	les (to you, to them) (Changes to se before lo, le, etc.)

† vos is used instead of tú in parts of Latin America (Central, Argentina, etc.); this is voseo.

†† le as a direct object pronoun is leísmo – used in much of Spain and accepted by RAE (unlike les as a direct object pronoun).  Used as either ‘him’ (a masculine person) or ‘formal you’ (a sort of neuter and polite you).