我 (wǒ) — I; me; my (first-person singular pronoun)

我 is the everyday 'I / me / my' pronoun. 我们 adds 们 for 'we / us'; 自己 is the reflexive 'myself' used when the subject acts on itself.

A drawing of the thing itself, worn down over three thousand years into a few strokes.

假借jiǎjièLater borrowed for its sound alone — the picture has nothing to do with today’s meaning.

The glyph 我 originally drew a trident-like weapon. It was borrowed purely for its sound to write the pronoun "I", so the picture and the meaning are unrelated.