About the Shadow (spoilers)

[Solarn]

Actually, Alexander was as afraid of the Shadow as Daniel (see also: him using Daniel to distract the Shadow and growing angrier as the player heads for the Inner Sanctum, bringing it with him) and Agrippa didn't even try to work with an Orb himself after his encounter with its guardian. One of Agrippa's random chatters in the Nave however reveals that Weyer could control the Orbs and their guardian perfectly.