An eidolon entry contains the following information, followed by a description of the eidolon's initial ability and abilities gained from the eidolon symbiosis and eidolon transcendence class features.

Tradition This is the eidolon's corresponding magical tradition, which determines the type of magic you can cast.
Traits All eidolons have the eidolon trait, and each type of eidolon has additional traits. They all appear in this entry. Home Plane This is the eidolon's home plane, where they go when unmanifested. This can help you determine the effects of abilities dependent on a creature's home plane, such as banishment.

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Size This is the eidolon's starting Size.
Suggested Attacks This entry suggests forms that the eidolon's attacks might take (see Unarmed Attacks above).
Eidolon Attributes Your eidolon's attributes other than Strength and Dexterity start at the values listed here (see Attribute Modifiers and Defenses).
Skills These are the skills that the eidolon has taught you, or that you learned as part of linking with your eidolon. You are trained in these skills, and the eidolon shares this proficiency as normal for their skills.
Senses This entry, if present, lists your eidolon's special senses. If this entry is not present, the eidolon has senses like a human's.
Language This is the eidolon's starting language. You know this language, in addition to the other languages you know normally. Your eidolon doesn't gain any additional languages based on their Intelligence modifier, but they can speak all the same languages you can.
Speed This entry lists your eidolon's Speeds.

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Eidolon Abilities The eidolon starts with an initial ability, gains the symbiosis ability when you gain the eidolon symbiosis class feature, and gains the transcendence ability when you gain the eidolon transcendence class feature.