SCP-XXXX was first found in the forest of [DATA REDACTED], America. The Extraction Team was dispatched immediately upon notice of SCP-XXXX to [DATA REDACTED] but was reportedly wiped out, due to arriving during one of SCP-XXXX's rage-induced attacks. Witnesses reported that the cause of SCP-XXXX's attack was because SCP-XXXX-2 had been kidnapped by a gang.
These sentences don't really say anything, since so much of it is redacted. The part we really care about in the discovery is how we found the thing, and how we contained the thing. Instead, what could you put here to help build up the story/set the scene for the story to come?
SCP-XXXX will become hostile with anyone that stays around it for over two hours, tries to take off its mask without it taking it off personally, or tries to interact with SCP-XXXX-2.
This suffers from weak tone, as well as using too many words to describe the effect. Remember that clinical is not the same as complex. What would an in-universe researcher need to know when they read this?
Extraction 1: Hey, are you all alright?
Civilian 1: Yeah, we're all okay. What the hell was that thing?
Extraction 1: Don't worry about it. Is that recording?
Civilian 1: What if it is?
Extraction 1: For your safety, I need to confiscate it.
I'm not entirely convinced this log is needed, it mostly details the civilians explaining parts of the anomaly we already know from the description. This space could be better used to advance the narrative more directly instead, such as exploring the motivations of the characters involved.
Observational Log XXXX.OL.1 Summary
Subject: SCP-XXXX and SCP-XXXX-2
Observational Notes: SCP-XXXX mainly sat in the corner of the enclosement while SCP-XXXX-2 would run around, summersault, roll, and play around in the enclosement. SCP-XXXX watches SCP-XXXX-2 at all times, except for when any personnel is in the enclosure. When SCP-XXXX-2 falls or injures itself, SCP-XXXX will get up, walk over to SCP-XXXX-2, and help them up, making sure they aren't hurt. SCP-XXXX will then either leave SCP-XXXX-2 to continue playing or will bring SCP-XXXX-2 over to the corner, holding it close.
Experiment (or in this case, observation) logs generally serve a pretty specific purpose: they provide escalation as the properties of the object are made more clear. These summaries don't really tell us a lot about what the anomaly does that we didn't already learn elsewhere. If you want to keep these logs, I would advise reading this essay on how to make them sustaining and interesting.
Overall, I feel like the concept isn't fleshed out to be engaging enough: this guy for some reason wants to protect the girl at any cost. You can develop the idea more by asking some questions, such as why he wants to protect her, or how he gained these capabilities in the first place. Remember that the object should be constructed as a vehicle for an engaging story.